St-Louis Cathedral, not to be missed, the work of Henri Picq, and its 58m-high spire have stood on Rue Victor-Shoelcher since 1895. Built on the site of St Louis Church, which fell foul of an earthquake and a fire, this metallic structure was designed to withstand such natural catastrophes, thanks in particular to the materials used (reinforced concrete and cast iron). It is worth venturing over the threshold to admire the luminous, beautifully proportioned interior, including a few late-19C details (altar, pulpit).