The Ballroom at the Prince George is part of the Madison Square North Historic District and listed on the National Register of Historic Places. Designed by Greenley, the ornate ballroom featured Renaissance-inspired murals and reproductions of famous paintings, along with intricate woodwork, marble mosaic floors, ceiling murals, and elaborate carvings. It features neo-Renaissance details, including plasterwork garlands, cherubs, and acanthus leaves. Column details include cherubim, fruit garlands and faces with leafy walrus mustaches. The room also has herringbone oak floors, and a marble mantelpiece. Eighteen-foot coffered ceilings are heavily ornamented.