A triumphal arch, inspired by those of the Roman Empire, it marks the old entry point to Marseille from the road from Aix-en-Provence (and by extension, connecting Marseille to Paris). Not nearly as grand as the Arch de Triomphe in Paris, it sits quietly, yet proud, at the Place Jules Guesde.
Honestly, it seems to me to be something that is overlooked by many tourists. Definitely add it to the list of must-sees for all history junkies.
Arc de Triomphe de la Porte d'Aix
bon-vivant added
Historical background: Originally envisaged in 1784, to honor Louis XIV, it was discarded during the French Revolution, and then resurrected again in 1823 to commemorate the French victories in the Spanish Civil War. It was finally completed in 1839 as a general symbol of victory.