Exhibit 31
                                                       ----------

                          CERTIFICATION

  I, Spencer Wertheimer, certify that:

1.     I  have reviewed this annual report on Form 10-K  for  the
 period  ended  December  31, 2004      of  Diversified  Historic
 Investors IV;

2.      Based  on my knowledge, this report does not contain  any
 untrue  statement of a material fact or omit to state a material
 fact  necessary  to make the statements made, in  light  of  the
 circumstances  under  which  such  statements  were  made,   not
 misleading with respect to the period covered by this report;

3.      Based  on  my  knowledge, the financial  statements,  and
 other  financial  information included in  this  report,  fairly
 present  in  all  material  respects  the  financial  condition,
 results  of operations and cash flows of the registrant  as  of,
 and for, the periods presented in this report;

4.       I   am  responsible  for  establishing  and  maintaining
 disclosure  controls and procedures (as defined in Exchange  Act
 Rules 13a-15(e) and 15d-15(e)) [Omission in accordance with  SEC
 Release Nos. 33-8238, 34-47986 and IC-26068 (June 5, 2003)]  for
 the registrant and have:

  (a)     Designed  such disclosure controls and  procedures,  or
    caused  such  disclosure  controls  and  procedures   to   be
    designed  under  my  supervision,  to  ensure  that  material
    information   relating  to  the  registrant,  including   its
    consolidated  subsidiaries, is made known  to  me  by  others
    within  those  entities, particularly during  the  period  in
    which this report is being prepared;

  (b)     [Omitted  in accordance with SEC Release Nos.  33-8238,
    34-47986 and IC-26068 (June 5, 2003)];

  (c)      Evaluated   the  effectiveness  of  the   registrant's
    disclosure  controls  and procedures and  presented  in  this
    report   my  conclusions  about  the  effectiveness  of   the
    disclosure  controls and procedures, as of  the  end  of  the
    period covered by this report based on such evaluation; and

  (d)     Disclosed in this report any change in the registrant's
    internal  control  over  financial  reporting  that  occurred
    during  the  registrant's  most recent  fiscal  quarter  (the
    registrant's fourth fiscal quarter in the case of  an  annual
    report)  that  has  materially  affected,  or  is  reasonably
    likely   to  materially  affect,  the  registrant's  internal
    control over financial reporting; and

5.      I  have disclosed, based on my most recent evaluation  of
 internal  control over financial reporting, to the  registrant's
 auditors  and the audit committee of the registrant's  board  of
 directors (or persons performing the equivalent functions):

  (a)     All significant deficiencies and material weaknesses in
    the  design  or operation of internal control over  financial
    reporting  which  are reasonably likely to  adversely  affect
    the  registrant's ability to record, process,  summarize  and
    report financial information; and

  (b)     Any  fraud,  whether  or  not material,  that  involves
    management or other employees who have a significant role  in
    the registrant's internal control over financial reporting.



Date: August 28, 2006                          /s/ Spencer Wertheimer
      ---------------                          ----------------------
                                        Name:  Spencer Wertheimer
                                       Title:  President (principal
                                               executive officer,
                                               principal financial
                                               officer) of the
                                               registrant's managing
                                               partner, EPK, Inc.

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