Replacing Reynoldas ceramic roof begins this month. What better way to acknowledge it (short of donning a hard hat) than to visit another American landmark designed by Charles Barton Keen? The mansion at Willows Park Preserve was built in 1910 and today serves the greater Philadelphia area as a Level I Arboretum and community space. Executive Director Will Nord will highlight the similarities and differences between Willows Park and Reynolda.