The Museum Manor of St. George is in a testamentary trust set up underneath the last will and testament of the late Eugenie A.T. Smith.
The purpose of the private trust is to promote the Smith family history dating back to 1683.
In or around 1718, 4,000 acres (16 km2) of the estate on the eastern side of Mastic Neck were acquired by Richard Floyd, who gave it to his son Nicoll.
Then called the Medal of Merit, the first Purple Heart in American history was earned by Sgt.
In 1955, Manor St. George was set up in a testamentary trust by Eugenie Annie Tangier Smith.
When Burt Smith died in 1967, Longwood was bought by real estate developers and destined for destruction.
After another real estate developer, Wilbur F. Breslin, proposed a huge residential, industrial, and commercial complex on the site, public outcry was enough that the house and 35 acres (0.14 km2) were donated to Brookhaven Town for preservation in 1974.
The Museum Manor of St George is open to the public free of charge from May 1 to October 30.