Welwyn Preserve

Welwyn was originally the estate of Harold Irving Pratt, an American oil industrialist and philanthropist who was born in 1877, and died at Glen Cove in 1939. Harold Pratt, the owner of Welwyn, was one of the sons of Charles Pratt, who was also an oil industrialist and was the founder of the Pratt Institute in Brooklyn, New York. Welwyn includes the estate's original Georgian-style mansion, which was built in 1906, and was designed by Babb, Cook & Willard. The home was renovated in 1920 by Delano & Aldrich. Pratt's wife, Harriet, was an avid horticulturist, leading to the installation of numerous greenhouses on the grounds as well as a luxury garden adjacent to the western side of the main home. ==As a preserve==

Welwyn Preserve is owned by Nassau County, New York, and is operated as a public preserve. The preserve includes a butterfly garden, extensive mature woodland, salt marsh and a tidal inlet. Dogs are not allowed in the preserve, in order to safeguard the wildlife. ==The museum==

In 1992, the Holocaust Memorial and Tolerance Center of Nassau County was founded at Welwyn, with the museum officially opening in 1994. Holocaust survivor Boris Chartan served as the first chairman of the museum until 2003. As of 2014, the museum is open on Mondays to Fridays from 10 am to 4:30 pm, and on Saturdays and Sundays from 12 pm to 4 pm. ==References==