Gunston Hall was completed in 1759. English carpenter William Buckland carved and designed the interior on wood in the Gunston Hall house that George mason owned from 1755-1759. It was a plantation home on the Potomac River. Gunston Hall was once the center of a 5,500-acre tobacco and wheat plantation. House servants, craftsmen, and their families were all residents on the plantation. The majority of people on the property were slaves. Today Gunston Hall is a 550-acre National Historic Landmark. They also have a museum, gift shop, tours, and research library. 

George Mason is the author of the Virginia Declaration of Rights. He was the first to write about religious toleration and freedom of the press.  He helped write the United States Constitution and Bill of Rights. George Mason and two other men refused to sign the Constitution. George Mason refused to sign because the Constitution at that point lacked a “Bill of Rights.”  He was an “anti-federalist” who valued states rights and individual citizen rights.

http://www.constitutionfacts.com/us-constitution-amendments/those-who-didnt-sign-the-constitution/