Gramercy Mansion was presented as a wedding gift to Cassatt's daughter, Eliza.
The farm was expanded with greenhouses in another location with the former fields containing hardy perennial herbs.
Koinonia Farms now produces culinary herbs and wholesales to Whole Foods, Giant and Graul's.
Currently, Gramercy Mansion on 45 acres is a bed and breakfast, and it hosts over 100 wedding receptions, elopements, parties, and business conferences each year.
The owners expanded and purchased a sister property in 2007, the 1840s Carrollton Inn and Plaza in Baltimore City.