Hollybush was built in 1849 for industrialist Thomas Whitney. In 1917, the Italianate villa on the Whitney Estate became part of the campus of the New Jersey State Normal School at Glassboro, now Rowan University. The house has served as the residence for college presidents and students, a museum, and a meeting facility. It is best known as the site of the 1967 global meeting between President Lyndon Johnson and Soviet Premier Alexei Kosygin, leaders of the Cold War superpowers. Hollybush was listed as the Whitney Mansion in the New Jersey Register of Historic Places on March 15, 1972, and in the National Register of Historic Places on December 5, 1972. Restoration has been made possible by the Garden State Historic Preservation Trust administered by the New Jersey Historic Trust/State of New Jersey.