Dundas-Lippincott mansion, northeast corner of Broad and Walnut streets, Philadelphia Exterior view from the southwest of the residence built circa 1838 after the designs of Thomas U. Walter for Philadelphia banker James Dundas at 1335 Walnut Street. Shows the property, known for its extensive gardens, surrounded by an ironwork fence. The residence, also known as the Yellow Mansion, was later the home of Agnes Keene Lippincott and her son, James Dundas Lippincott. Building demolished circa 1905.