Image by Joaquin Ossorio Castillo Shutterstock
This elegant ecclesiastical structure is the mother church of the Dominican order, founded in 1215. First admire the Église des Jacobins' ornate stained-glass windows before wandering through the Cloitre des Jacobins, in which graceful russet-brick columns surround a green courtyard. Pause in chapels and side rooms along the way, like the echoing Salle Capitulaire, a 14th-century hall ornamented with a haloed lamb and grisaille portraits of Dominican saints. Don't miss Chapelle St-Antonin, with its 14th-century ceiling frescoes showing apocalyptic scenes.
St Thomas Aquinas (1225–74), the monk-philosopher and early head of the Dominican order, is buried beneath the church altar.