The Opéra de Marseille (officially the Opéra Municipal) sits a block south of the Vieux-Port on the Place Reyer. The original 1787 building burned to the ground in 1919; only the colonnaded portico survived and was incorporated into the Art Deco rebuild that opened in 1924. The result is unusual — a sober 18th-century facade fronting a streamlined interior of bronze, marble and gilt that would look at home in a 1930s ocean liner.
The 1,800-seat hall has good acoustics and an ambitious programme of opera, ballet and concerts running roughly September to June. Tickets are reasonably priced by international standards. Worth a look at the exterior friezes and statuary even if you are not attending a performance; the bas-reliefs depict the muses and were carved by some of the leading Art Deco sculptors of the period.