The southwestern side of Colonel's Row is dominated by Liggett Hall (building 400), a three-to-four-story barracks that spans nearly the entire width of Governors Island, measuring long with two wings extending south. Initially built in 1930 for the 16th Infantry, it was among the largest military barracks in the world when completed, and was the first Army building intended to house an entire regiment. The building contains a ground-level arcade that bisects the first and second floors, as well as an annex to the southeast. Two nearly identical Georgian Revival structures, building 550 (now the New York Harbor School) to the north and building 333 to the south, are located directly adjacent to Liggett Hall. The three-story structures are both U-shaped with the wings surrounding a front courtyard; they were built in 1932 as detachment housing for the First Army before being used by the Coast Guard as classrooms. Nearby are a smaller pair of nearly identical -story family housing blocks for the 16th Regiment, built in 1940. These consist of building 555 to the north of building 550, and building 315 near the southern waterfront south of the YMCA and theater.