Troyes developed as early as the Roman era, when it was known as Augustobona Tricassium. It stood at the hub of numerous highways, primarily the Via Agrippa. The city has a rich historical past, from the Tricasses tribe to the liberation of the city on August 25, 1944 during the Second World War, including the Battle of the Catalaunian Plains, the Council of Troyes, the marriage of Henry V and Catherine of France, and the Champagne fairs to which merchants came from all over Christendom. The city has a rich architectural and urban heritage: many buildings are protected as historical monuments, including the half-timbered houses (mainly of the 16th century) that survived in the old town. They have contributed to Troyes being designated as a City of Art and History.