The convention was held at the 1851 landmark Maryland Institute for the Promotion of the Mechanic Arts over the old Centre ( " Marsh " ) Market in Market Place ( formerly Harrison Street ) between East Baltimore Street and Water Street along South Gay Street and the west bank of the Jones Falls stream through downtown Baltimore , in Maryland on September 17 and September 18 , 1856 . The same site had hosted the 1852 Whig National Convention
1852 Whig National Convention
1852 Whig National Convention
1856 Whig National Convention