Palace built in the French Baroque style in the XVIII-storey with mezzanine. His main volume has a square plan, is attached to a rectangular wing. The architecture meets the monumental decision of openwork metal fence gate, separating Courtyard of the street. The walls are different characteristic of the Baroque style of soft plastic, diversify their surface appearances rustuvannya and pilasters, cornices and rozchiplennya interfloor poyasochky, decorated pediment windows and flowing lines frontons on the facades. Sapyehy Palace, also called "Palace of the gate, was built for princes Sapyeha by the architect A. Kuhn. A descendant of the ancient Lithuanian-Ruthenian family Sapyeha Adam, who commissioned for a palace, was one of the most prominent sponsors of railway construction in Galicia. Construction of the palace cost almost as expensive as the construction of the Palace of Potocki.