Not every Philadelphia home on the market has a story. This one has several. Located at 42 Summit St. in Chestnut Hill is an estate that dates to 1863 and designed in the Italianate/Second Empire style. Listed at $2,195,000, it offers 6 bedrooms, 3.5 bathrooms, and 4,230 square feet of living space on a 0.6-acre lot. . . The approach alone sets a tone. It’s a stone wall and circular driveway lead to a wraparound porch that signals what’s waiting inside.