Architecture in Wilmington includes several popular styles, from the Revolution through the late 20th century. There are numerous examples of Federal, Queen Anne, and American Four Square. Visitors willing to spend a bit more time searching will also find scattered samples of Second Empire, Richardson Romanesque, Italian Villa, Greek Revival, Georgian, Art Deco, and International Style. 

One spot especially worth checking out is the Market Street Mall, a six-block pedestrian concourse. The northern end is home to architecturally acclaimed Rodney Square and the Wilmington Public Library. Below 9th Ninth Street is the Grand Opera House, another architectural landmark. Another interesting building is the Old Swedes Church on Church Street. Built in 1698, it is the nation’s oldest church building still standing as originally built. The church property includes the Hendrickson House, a stone farmhouse built in 1690.