The park grew out of the Lemon Hill estate of Henry Pratt, whose land was originally owned by Robert Morris, signer of the Declaration of Independence.

[10](Ironically the land the Sedgeley mansion was built on had originally been owned by Robert Morris although after his bankruptcy it had been sold to a different purchaser then Henry Pratt).

[12] The Art Association continues to commission and care for a large number of sculptures, in coordination with the park and city.

[13] Mount Pleasant, built in 1762–65 for a Scottish ship captain named John Macpherson, is administered by the Philadelphia Museum of Art.

The Art Museum also administers Cedar Grove Mansion, a house built in 1748–50 in what later became the Frankford neighborhood of the city.

[23] Sedgeley Mansion was built in 1799 on Lemon Hill, then abandoned and later demolished after being acquired through eminent domain by the city in 1857.