The Chapel of St Michael d'Aiguilhe is a pilgrimage chapel perched atop a volcanic plug in Le Puy-en-Velay, Auvergne. Jutting dramatically towards heaven, the rock has been a sacred place for thousands of years: a prehistoric dolmen was built there and the Romans dedicated it to Mercury before the Christians built a chapel to St. Michael. The Chapel was built in 962. It was a simple shrine on a central plan: a square sanctuary with a tiny apsidole on each side. This original sanctuary still survive today. In the 12th century, the chapel was enlarged by adding a short nave west of the original sanctuary, two side chapels, a carved portal, and a bell tower.