Fodor's Expert Review Basilique St-Sernin

Toulouse's most famous landmark and the world's largest Romanesque church once belonged to a Benedictine abbey, built in the 11th century to house pilgrims on their way to Santiago de Compostela in Spain. Inside, the aesthetic high point is the magnificent central apse, begun in 1080, glittering with gilded ceiling frescoes, which date to the 19th century. When illuminated at night, St-Sernin's five-tier octagonal tower glows red against the sky. Not all the tiers are the same: the first three, with their rounded windows, are Romanesque; the upper two, with pointed Gothic windows, were added around 1300. The ancient crypt contains the relics and reliquaries of 128 saints, but its most famed treasure is a thorn that legend says is from the Crown of Thorns.