Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Location | City | Listing date |
| --- | --- | --- | --- |
| Algonac City Hall (Demolished) | 1410 St. Clair River Drive | Algonac | February 7, 1977 |
| Almont New Church (Swedenborgian) | Northeast corner of Cameron and Tubspring roads | Allenton vicinity | March 28, 1985 |
| America's Water Speed Supremacy Commemorative Designation | City of Algonac Park | Algonac | January 8, 1981 |
| Dr. Walter Bostwick House | 1240 St. Clair River Drive | Algonac | August 3, 1979 |
| Catholic Pointe | 618 South Water Street, SE corner of Bridge Street | Marine City | August 12, 1977 |
| Cole Class - West Brockway Methodist Church Informational Designation | 7015 Carson Road, NE corner of Wilkes Road | Yale vicinity | June 30, 1988 |
| Colony Tower | 6503 Dyke Road (M-29) | Clay Township | April 21, 1980 |
| Congregational Church | 300 Adams St | St. Clair | August 3, 1979 |
| James A. Davidson House | 1229 Seventh Street | Port Huron | September 21, 1983 |
| Wilbur F. Davidson House† | 1707 Military Street | Port Huron | May 17, 1973 |
| East China Fractional District No. 2 School | 696 Meisner Road | Marine City | July 18, 1991 |
| First Baptist Church (Demolished) | Erie Square | Port Huron | August 13, 1971 |
| First Baptist Church | 308 South Fourth Street | St. Clair | September 26, 1987 |
| Fort Gratiot† | 520 State Street | Port Huron | February 18, 1956 |
| Fort Gratiot Lighthouse† | Omar and Garfield streets | Port Huron | April 23, 1971 |
| Fort Sinclair (20SC58) | South of the mouth of the Pine River on the St. Clair River | St. Clair | February 17, 1965 |
| Fort St. Joseph | Gratiot Park on M-25 (Gratiot Avenue) and Forest Street, under the Bluewater Bridge | Port Huron | August 23, 1956 |
| Grace Episcopal Church | 1213 Sixth Street | Port Huron | April 18, 1991 |
| Grand Trunk Western Railroad Depot† | 520 State Street | Port Huron | September 2, 1966 |
| Gratiot Park United Methodist Church | 2503 Cherry Street | Port Huron | March 10, 1988 |
| Graziadei-Casello Building | 307 Huron Avenue | Port Huron | November 16, 1995 |
| Harrington Hotel† | 1026 Military, between Pine and Wall Streets | Port Huron | November 16, 1981 |
| Harsen Home | 2006 Golf Course Road | Harsens Island | February 7, 1977 |
| Ladies of the Maccabees Building† | 901 Huron Avenue | Port Huron | November 16, 1982 |
| Lightship No. 103‡ | Pine Grove Park | Port Huron | May 17, 1973 |
| Marine City City Hall† | 300 Broadway Street | Marine City | August 6, 1976 |
| James McColl House† | 205 South Main Street | Yale | January 8, 1981 |
| George H. McIntyre House | 4207 South River Road | St. Clair | September 29, 1972 |
| Newport Academy | 405 South Main Street | Marine City | June 15, 1979 |
| North Channel Shooting Club | 1001 North Channel, on the St. Clair River | Clay Township | January 21, 1988 |
| Port Huron High School | 323 Erie Street | Port Huron | December 15, 1988 |
| Ruby Methodist Church | 6650 Abbottsford Road, near Brott Road | Ruby | July 19, 1990 |
| Saint Andrew's Episcopal Church | 1507 St. Clair River Drive | Algonac | January 16, 1990 |
| Saint Clair Inn† | 500 Riverside | St. Clair | October 20, 1994 |
| Saint Clair River Informational Designation | 2 Miles north of Algonac on M-29 | Algonac | January 19, 1957 |
| St. Clair River Tunnel‡ | Between Johnstone & Beard, near 10th Street (portal site) | Port Huron | August 23, 1956 |
| Saint Johannes Evangelische Kirche | 710 Pine Street, at Seventh Street | Port Huron | March 19, 1980 |
| Saint Mary's Catholic Church and Rectory | 415 North Sixth Street, between Vine and Orchard streets | St. Clair | September 25, 1985 |
| Jefferson Sheldon House | 807 Prospect Place | Port Huron | April 19, 1990 |
| Trinity Evangelical Lutheran Church | 1517 Tenth Street | Port Huron | August 29, 1996 |
| Wales Township Hall | 1372 Wales Center | Wales Township | July 18, 1996 |
| Ward-Holland House† | 433 North Main Street | Marine City | May 5, 1964 |
| E. C. Williams House | 2511 Tenth Avenue, between Hancock and Church streets | Port Huron | November 18, 1993 |
| C. H. Wills & Company | Chrysler Plant, 840 Huron Avenue | Marysville | June 23, 1983 |
| Woman's Benefit Association Building | 1338 Military Street | Port Huron | December 15, 1988 |
Question:
which city is home to the greatest number of historic sites, existing or demolished?
Answer:
Port Huron