Long Branch is a Classical Revival mansion built for Robert Carter Burwell and is one of the few remaining residential works in which B. Henry Latrobe, father of the American architectural profession, played a role in the design. In 1811, a few months after workmen had laid the foundations, Latrobe offered suggestions to Burwell for a staircase and piazza. After 1842, Hugh Mortimer Nelson added the porticoes and castellated east wing, as well as the Greek Revival-style interior trim based on designs published by the architect Minard Lefever. Harry Z. Isaacs renovated the mansion in 1989.