UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                  FORM 10-K


  (Mark one)

  /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the fiscal year ended December 31, 2007

      OR


  / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934
      For the transition period from ____________ to ____________



      Commission file number: 333-137192-02

      Credit Suisse Commercial Mortgage Trust 2007-C1
      (Exact name of issuing entity as specified in its charter)

      Credit Suisse First Boston Mortgage Securities Corp.
      (Exact name of the depositor as specified in its charter)

      Column Financial, Inc.
      Capmark Finance, Inc.
      (Exact name of the sponsors as specified in their charters)



  New York                                54-2199267
  (State or other jurisdiction of         54-2199268
  incorporation or organization)          54-6740331
                                          (I.R.S. Employer
                                          Identification No.)


   c/o Wells Fargo Bank, N.A.
   9062 Old Annapolis Road
   Columbia, MD                                 21045
  (Address of principal executive               (Zip Code)
  offices)


 Registrant's telephone number, including area code: (410) 884-2000




  Securities registered pursuant to Section 12(b) of the Act:

    NONE.



  Securities registered pursuant to Section 12(g) of the Act:

    NONE.



  Indicate by check mark if the registrant is a well-known seasoned issuer, as
  defined in Rule 405 of the Securities Act.

    Yes ___     No  X



  Indicate by check mark if the registrant is not required to file reports
  pursuant to Section 13 or Section 15(d) of the Act.*

    Yes ___     No  X



  * The issuing entity has been required to file reports with respect to the
  period following the issuance of securities and ending December 31, 2007.
  The issuing entity has filed a Form 15.

  Note - Checking the box above will not relieve any registrant required to
  file reports pursuant to Section 13 or 15(d) of the Exchange Act from their
  obligations under those Sections.


  Indicate by check mark whether the registrant (1) has filed all reports
  required to be filed by Section 13 or 15(d) of the Securities Exchange Act
  of 1934 during the preceding 12 months (or for such shorter period that the
  registrant was required to file such reports), and (2) has been subject to
  such filing requirements for the past 90 days.*

    Yes  X      No ___



  * The issuing entity has been required to file reports with respect to the
  period following the issuance of securities and ending December 31, 2007.
  The issuing entity has filed a Form 15.

  Indicate by check mark if disclosure of delinquent filers pursuant to Item
  405 of Regulation S-K (Section 229.405 of this chapter) is not contained
  herein, and will not be contained, to the best of registrant's knowledge, in
  definitive proxy or information statements incorporated by reference in Part
  III of this Form 10-K or any amendment to this Form 10-K.

    Not applicable.



  Indicate by check mark whether the registrant is a large accelerated filer,
  an accelerated filer, a non-accelerated filer, or a smaller reporting
  company.  See the definitions of "large accelerated filer", "accelerated
  filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

   Large accelerated filer ___
   Accelerated filer ___
   Non-accelerated filer X (Do not check if a smaller reporting company)
   Smaller reporting company ___

  Indicate by check mark whether the registrant is a shell company (as defined
  in Rule 12b-2 of the Act).

    Yes ___     No  X



  State the aggregate market value of the voting and non-voting common equity
  held by non-affiliates computed by reference to the price at which the
  common equity was last sold, or the average bid and asked price of such
  common equity, as of the last business day of the registrant's most recently
  completed second fiscal quarter.

    Not applicable.



  Indicate by check mark whether the registrant has filed all documents and
  reports required to be filed by Section 12, 13 or 15(d) of the Securities
  Exchange Act of 1934 subsequent to the distribution of securities under a
  plan confirmed by a court.

    Not applicable.



  Indicate the number of shares outstanding of each of the registrant's
  classes of common stock, as of the latest practicable date.

    Not applicable.



  DOCUMENTS INCORPORATED BY REFERENCE

  List hereunder the following documents if incorporated by reference and the
  Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the document
  is incorporated: (1) Any annual report to security holders; (2) Any proxy or
  information statement; and (3) Any prospectus filed pursuant to Rule 424(b)
  or (c) under the Securities Act of 1933. The listed documents should be
  clearly described for identification purposes (e.g., annual report to
  security holders for fiscal year ended December 24, 1980).

  Pooling and Servicing Agreement (Filed as Exhibit 4.1 to the Registrant's
  Current Report on Form 8-K filed on April 2, 2007) incorporated by reference
  in Part IV.

  Column Mortgage Loan Purchase Agreement (Filed as Exhibit 10.1 to the
  Registrant's Current Report on Form 8-K filed on April 2, 2007) incorporated
  by reference in Part IV.

  Capmark Mortgage Loan Purchase Agreement (Filed as Exhibit 10.2 to the
  Registrant's Current Report on Form 8-K filed on April 2, 2007) incorporated
  by reference in Part IV.

  ISDA Master Agreement dated as of March 16, 2007, between Credit Suisse
  International and Wells Fargo Bank, N.A., not in its individual or corporate
  capacity but solely as trustee on behalf of Credit Suisse Commercial
  Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.3 to the Registrant's
  Current Report on Form 8-K filed on April 2, 2007) incorporated by reference
  in Part IV.

  Schedule to the ISDA Master Agreement dated as of March 16, 2007, between
  Credit Suisse International and Wells Fargo Bank, N.A., not in its
  individual or corporate capacity but solely as trustee on behalf of Credit
  Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.4 to
  the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  incorporated by reference in Part IV.

  ISDA Credit Support Annex (Bilateral Form--New York Law) to the Schedule to
  the ISDA Master Agreement dated as of March 16, 2007, between Credit Suisse
  International and Wells Fargo Bank, N.A., not in its individual or corporate
  capacity but solely as trustee on behalf of Credit Suisse Commercial
  Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.5 to the Registrant's
  Current Report on Form 8-K filed on April 2, 2007) incorporated by reference
  in Part IV.

  Confirmation dated as of March 16, 2007, by Credit Suisse International and
  Credit Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit
  10.6 to the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  incorporated by reference in Part IV.

  Novation Confirmation dated as of March 16, 2007, among Credit Suisse
  International, Credit Suisse Management LLC and Wells Fargo Bank, N.A., not
  in its individual or corporate capacity but solely as trustee on behalf of
  Credit Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit
  10.7 to the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  incorporated by reference in Part IV.



                                     PART I

  Item 1.      Business.

               Omitted.


  Item 1A.     Risk Factors.

               Omitted.


  Item 1B.     Unresolved Staff Comments.

               None.


  Item 2.      Properties.

               Omitted.


  Item 3.      Legal Proceedings.

               Omitted.


  Item 4.      Submission of Matters to a Vote of Security Holders.

               Omitted.




                                     PART II

  Item 5.      Market for Registrant's Common Equity, Related Stockholder
               Matters and Issuer Purchases of Equity Securities.

               Omitted.


  Item 6.      Selected Financial Data.

               Omitted.


  Item 7.      Management's Discussion and Analysis of Financial Condition and
               Results of Operation.

               Omitted.


  Item 7A.     Quantitative and Qualitative Disclosures About Market Risk.

               Omitted.


  Item 8.      Financial Statements and Supplementary Data.

               Omitted.


  Item 9.      Changes in and Disagreements With Accountants on Accounting and
               Financial Disclosure.

               Omitted.


  Item 9A.     Controls and Procedures.

               Omitted.


  Item 9A(T).  Controls and Procedures.

               Omitted.


  Item 9B.     Other Information.

               None.




                                    PART III

  Item 10.     Directors, Executive Officers and Corporate Governance.

               Omitted.


  Item 11.     Executive Compensation.

               Omitted.


  Item 12.     Security Ownership of Certain Beneficial Owners and Management
               and Related Stockholder Matters.

               Omitted.


  Item 13.     Certain Relationships and Related Transactions, and Director
               Independence.

               Omitted.


  Item 14.     Principal Accounting Fees and Services.

               Omitted.




  ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB


Item 1112(b) of Regulation AB, Significant Obligor Financial Information.

No single obligor represents 10% or more of the pool assets held by the issuing
entity.



Item 1114(b)(2) of Regulation AB, Significant Enhancement  Provider Financial
Information.

No entity or group of affiliated entities provides any external credit
enhancement or other support for the certificates within this transaction as
described under Item 1114 (a) of Regulation AB.



Item 1115(b) of Regulation AB, Certain Derivatives Instruments (Financial
Information).

Credit Suisse International provides a swap derivative instrument for the trust
as disclosed in the 424 Prospectus.  No additional disclosure is necessary
because the significance percentage for the swap agreement is less than 10%.



Item 1117 of Regulation AB, Legal Proceedings.

The registrant knows of no material pending legal proceedings involving the
trust and all parties related to such trust, other than routine litigation
incidental to the duties of those respective parties.



Item 1119 of Regulation AB, Affiliations and Certain Relationships and Related
Transactions.

The information regarding this Item has been previously filed in a 424(b)(5)
filing dated March 9, 2007. No additional information regarding this Item has
been identified since such 424(b)(5) filing.



Item 1122 of Regulation AB, Compliance with Applicable Servicing Criteria.

The reports on assessment of compliance with the servicing criteria for
asset-backed securities and the related attestation reports on such assessments
of compliance are attached hereto under Item 15.



Item 1123 of Regulation AB, Servicer Compliance Statement.

The servicer compliance statements are attached hereto under Item 15.



                               Part IV

  Item 15. Exhibits, Financial Statement Schedules.

  (a) Exhibits.

  (4.1) Pooling and Servicing Agreement (Filed as Exhibit 4.1 to the
  Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.1) Column Mortgage Loan Purchase Agreement (Filed as Exhibit 10.1 to the
  Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.2) Capmark Mortgage Loan Purchase Agreement (Filed as Exhibit 10.2 to
  the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.3) ISDA Master Agreement dated as of March 16, 2007, between Credit
  Suisse International and Wells Fargo Bank, N.A., not in its individual or
  corporate capacity but solely as trustee on behalf of Credit Suisse
  Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.3 to the
  Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.4) Schedule to the ISDA Master Agreement dated as of March 16, 2007,
  between Credit Suisse International and Wells Fargo Bank, N.A., not in its
  individual or corporate capacity but solely as trustee on behalf of Credit
  Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.4 to
  the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.5) ISDA Credit Support Annex (Bilateral Form--New York Law) to the
  Schedule to the ISDA Master Agreement dated as of March 16, 2007, between
  Credit Suisse International and Wells Fargo Bank, N.A., not in its
  individual or corporate capacity but solely as trustee on behalf of Credit
  Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.5 to
  the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (10.6) Confirmation dated as of March 16, 2007, by Credit Suisse
  International and Credit Suisse Commercial Mortgage Trust Series 2007-C1
  (Filed as Exhibit 10.6 to the Registrant's Current Report on Form 8-K filed
  on April 2, 2007) (Incorporated by reference)

  (10.7) Novation Confirmation dated as of March 16, 2007, among Credit Suisse
  International, Credit Suisse Management LLC and Wells Fargo Bank,  N.A., not
  in its individual or corporate capacity but solely as trustee on behalf of
  Credit Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit
  10.7 to the Registrant's Current Report on Form 8-K filed on April 2, 2007)
  (Incorporated by reference)

  (31) Rule 13a-14(d)/15d-14(d) Certifications.

  (33) Reports on assessment of compliance with servicing criteria for
  asset-backed securities.


    <TABLE>
    
      <c>

    33.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    33.2 Capmark Finance Inc. as primary servicer
    33.3 Centerline Servicing Inc. as sub-servicer to Column Financial, Inc.
    33.4 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    33.5 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    33.6 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement
    33.7 Wells Fargo Bank, N.A. as custodian under The Pooling and Servicing Agreement

    </TABLE>


  (34) Attestation reports on assessment of compliance with servicing criteria
  for asset-backed securities.


    <TABLE>
    
      <c>

    34.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    34.2 Capmark Finance Inc. as primary servicer
    34.3 Centerline Servicing Inc. as sub-servicer to Column Financial, Inc.
    34.4 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    34.5 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    34.6 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement
    34.7 Wells Fargo Bank, N.A. as custodian under The Pooling and Servicing Agreement

    </TABLE>


   (35) Servicer compliance statements.


    <TABLE>
    
       <c>

    35.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    35.2 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    35.3 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    35.4 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement

    </TABLE>


   (b) Not applicable.

   (c) Omitted.



                          SIGNATURES


  Pursuant to the requirements of Section 13 or 15(d) of the Securities
  Exchange Act of 1934, the registrant has duly caused this report to be
  signed on its behalf by the undersigned, thereunto duly authorized.


   Credit Suisse First Boston Mortgage Securities Corp.
   (Depositor)


   /s/ Jeffrey A. Altabef
   Jeffrey A. Altabef, Vice President
   (Senior officer in charge of securitization of the depositor)


    Date:   March 28, 2008



  Exhibit Index

  Exhibit No.


   (4.1) Pooling and Servicing Agreement (Filed as Exhibit 4.1 to the
   Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.1) Column Mortgage Loan Purchase Agreement (Filed as Exhibit 10.1 to
   the Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.2) Capmark Mortgage Loan Purchase Agreement (Filed as Exhibit 10.2 to
   the Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.3) ISDA Master Agreement dated as of March 16, 2007, between Credit
   Suisse International and Wells Fargo Bank, N.A., not in its individual or
   corporate capacity but solely as trustee on behalf of Credit Suisse
   Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.3 to the
   Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.4) Schedule to the ISDA Master Agreement dated as of March 16, 2007,
   between Credit Suisse International and Wells Fargo Bank, N.A., not in its
   individual or corporate capacity but solely as trustee on behalf of Credit
   Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.4 to
   the Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.5) ISDA Credit Support Annex (Bilateral Form--New York Law) to the
   Schedule to the ISDA Master Agreement dated as of March 16, 2007, between
   Credit Suisse International and Wells Fargo Bank, N.A., not in its
   individual or corporate capacity but solely as trustee on behalf of Credit
   Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as Exhibit 10.5 to
   the Registrant's Current Report on Form 8-K filed on April 2, 2007)
   (Incorporated by reference)

   (10.6) Confirmation dated as of March 16, 2007, by Credit Suisse
   International and Credit Suisse Commercial Mortgage Trust Series 2007-C1
   (Filed as Exhibit 10.6 to the Registrant's Current Report on Form 8-K filed
   on April 2, 2007) (Incorporated by reference)

   (10.7) Novation Confirmation dated as of March 16, 2007, among Credit
   Suisse International, Credit Suisse Management LLC and Wells Fargo Bank,
   N.A., not in its individual or corporate capacity but solely as trustee on
   behalf of Credit Suisse Commercial Mortgage Trust Series 2007-C1 (Filed as
   Exhibit 10.7 to the Registrant's Current Report on Form 8-K filed on April
   2, 2007) (Incorporated by reference)

   (31) Rule 13a-14(d)/15d-14(d) Certifications.

   (33) Reports on assessment of compliance with servicing criteria for
   asset-backed securities.


    <TABLE>

    
      <c>
    33.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    33.2 Capmark Finance Inc. as primary servicer
    33.3 Centerline Servicing Inc. as sub-servicer to Column Financial, Inc.
    33.4 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    33.5 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    33.6 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement
    33.7 Wells Fargo Bank, N.A. as custodian under The Pooling and Servicing Agreement

    </TABLE>

   (34) Attestation reports on assessment of compliance with servicing
   criteria for asset-backed securities.


    <TABLE>

    
      <c>
    34.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    34.2 Capmark Finance Inc. as primary servicer
    34.3 Centerline Servicing Inc. as sub-servicer to Column Financial, Inc.
    34.4 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    34.5 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    34.6 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement
    34.7 Wells Fargo Bank, N.A. as custodian under The Pooling and Servicing Agreement

    </TABLE>

   (35) Servicer compliance statements.


    <TABLE>

    
       <c>
    35.1 Capmark Finance Inc. as master servicer under The Pooling and Servicing Agreement
    35.2 Column Financial, Inc. as primary servicer to Capmark Finance Inc.
    35.3 Midland Loan Services, Inc. as special servicer under The Pooling and Servicing
    Agreement
    35.4 Wells Fargo Bank, N.A. as trustee under The Pooling and Servicing Agreement

    </TABLE>