Cathedral of San Giusto is the main Church of the city of Susa, standing in its historical center, and the chair of the local Bishop. Originally the Cathedral was the only Church of the homonymous Benedictine monastery, founded in 1029-year by order of the Marquis of Ulderico Manfredi to store the newly found relics of Saint Justus (San Giusto). The Church was built around 1100, the year and since then it was rebuilt several times and was modified. Only in 1772, the year, when it created the diocese of Susa, the former monastery Church received the status of a Cathedral with all relying honors.

San Giusto built in the Romanesque style. The facade is adorned with terracotta and the Roman gate is connected to the 4th century Port Savoie, standing to the South of the Cathedral. On the same side of the towering six-story bell tower with a number of arched Windows, which dominates the surrounding houses.

Inside the Cathedral has a Latin cross plan with a Central nave and two side aisles. There is the baptistery, which dates from an earlier era than the Church itself. And in the Eastern part of the Church stands a small bowl of Holy water, set in 1688, the year. Draws attention to the statue, which they say depicts Marquis of Turin Adelaide, daughter and heiress of Ulderico Manfredi and wife of the count of Savoy Otton, she was a founder of the Royal Savoy.