Lahr Farm is a historic home and farm located in Warwick Township, Chester County, Pennsylvania. It was originally owned by a wealthy Quaker ironmaster William Branson and part of his Reading Furnace estate.[2] The farm has three contributing buildings; the main house, bank barn, and wash hour or latchen. The house is a 2+1⁄2-story, four-bay by two-bay, fieldstone dwelling with a gable roof. The farm was inherited by Branon's grandson a wealthy ironmaster Samuel Van Leer. The Van Leer Family's original surname spelling was Von Lahr.[3] The farm remained in the Lahr family from 1834 to 1938.[4]