Will Minster September 13, 2015 Misc Old Town Hall Museum Will Minster September 13, 2015 Misc 512 N Market StreetWilmington DE 19801(302) 655-7161 Old Town Hall is a historic town hall located at Wilmington, New Castle County, Delaware. It was built in 1798, and is a large two-story brick building in a late-Georgian / early-Federal style. The roof is gently sloping and is topped by a large octagonal cupola and once had a wooden balustrade. The building housed the Wilmington city government until 1916 and served as a focal point of many public events in Delawares history.[2] The property is owned and managed by the Delaware Historical Society Visit Website