Sens is an ancient city, with a history going back to the days when France was a Celtic land, and then the days of Roman rule, when it was called Agedincum. Its archbishops were powerful and prestigious during the Middle Ages, which accounts for the town's famous Gothic cathedral. As Paris rose in power and influence, Sens eventually declined, with the result that its rich heritage of historic buildings has remained more nearly intact.
- Cathédrale Saint-Étienne de Sens, a Gothic edifice which has an impressive exterior and lovely rose windows. It is considered an early Gothic building because construction began in 1140, though the church was not fully completed until the 16th century. A view of its interior was painted by the famous French painter, Camille Corot, in 1874.
- Palais des Archevêques (Palace of the Archbishops)
- The 13th-century Église Saint-Maurice de Sens
- The Musée de Sens contains art from the Roman town of Agedincum, former name for Sens.
- Maison d'Abraham, a historic house.
- Palais Synodal, a 13th-century building with a beautiful roof.
- Le Marché Couvert (the market hall)