At 4th and West Streets, you'll find the Quaker meeting house still active in Wilmington's Quaker Hill neighborhood. This meeting is still active today, with a membership of about 400 and belonging to the Philadelphia Yearly Meeting. The building you see was raised in 1815–1817 and would later be recognized on the National Register of Historic Places in 1976.
The story here reaches back much farther: the very first Quaker meeting in Delaware met in New Castle at Governor Lovelace’s house in September 1672 when George Fox visited. After William Penn became proprietor of the “Three Lower Counties,” meetings formed in Newark, Centre and New Castle, and regular worship did not begin in Wilmington until 1735. In that year William and Elizabeth Shipley built a one-story brick house near Fourth and Shipley Streets, used as a Preparative Meeting and officially beginning in 1738; by 1750 the Concord Quarterly Meeting granted Monthly Meeting status.
Across the street from you a 1738 meetinghouse once stood, 25 feet square, and in 1748 a larger meetinghouse on this site was built to hold 500 people. Picture the 1738 and 1748 meetinghouses that once stood nearby, across this very intersection.