The collegiate church, started in 1260, cannot be missed on Notre-Dame Square! With its powerful corner buttresses adorned with pinnacles and its belltower porch, through which runs a road, it is more akin to a fortress. Its current 59m-high roof dates from 1585. Inside the church, look out for the marble medallion on the altar depicting the Visitation and reported to be the work of the school of Pierre Puget, and the 36 oak stalls by the workshop of André Sulpice.