Thomas Leiper Estate
The Thomas Leiper Estate, also known as Avondale, is a historic estate located at Wallingford in Nether Providence Township, Delaware County, Pennsylvania. It was built by Thomas Leiper around 1785, and named Strath Haven after Leiper's birthplace in Strathaven, Scotland. The estate includes the following: the three-story, yellow stuccoed mansion house, "Fireproof" vault, communal outhouse, barn, carriage house, smokehouse, warehouse, tenant's house, and quarry. The local high school, Strath Haven High School, is named for the estate.
It was added to the National Register of Historic Places in 1971.
The Friends of the Leiper House offers weekend guided tours of the house from April through December.
