??Built by the Thomas Family in the early 1800s,this property, formerly known as Woodlawn, has national significance. In 1816, Samuel and Anna Thomas established a Friends Boarding School here. Francis Scott Key frequently visited his daughters who attended this school. Another owner, Phillip Evan Thomas, chartered the first American railroad, the Baltimore and Ohio, in 1827. Quaker physician, William Palmer, an incorporator of the Mutual Fire Insurance Company of Montgomery County, Maryland, one of the nation's earliest, purchased the property in the 1820s. In 1832, Dr. Palmer hired stonemason, Isaac Holland to build the unique barn. The property remained in the Palmer family for the next century. In the 1940s, Woodlawn became the McKeever Estate until the M-NCPPC purchase in the 1970s.