Keywords: Solitude Philadelphia.jpg 39 972615 -75 195720 Solitude built 1785 by John Penn William Penn's grandson<br>Located in West w Fairmount Park on the grounds of the Philadelphia Zoo at 3400 West Girard Avenue Philadelphia PA 19104 Library of Congress Prints Photographs Online Catalog http //loc gov/pictures/item/pa0893/ HABS PA 51-PHILA 30-5 1961-04 Creator Jack Boucher PA 51-PHILA 30- PD-USGov 1961 in Philadelphia Built in Pennsylvania in 1785 Houses in Fairmount Park 1780s houses in Pennsylvania Houses built in the United States in 1785 Stone houses in Pennsylvania Buildings in Philadelphia Pennsylvania Jack Boucher |