Le Marais is the district where you can still read the street plan of pre-Revolution Paris. You wander lanes too narrow for two cars, past galleries, boutiques and falafel counters, then push open a heavy carriage door and find a silent cobbled courtyard the street never hinted at. Those courtyards belong to hôtels particuliers, the grand private mansions France's nobility built here through the 1600s, once Henri IV laid out the arcaded square now called Place des Vosges. Haussmann's boulevards, which flattened much of old Paris, largely bypassed it.
When the aristocrats moved to the Left Bank, the quarter slid into a warren of workshops and tenements, which is the accident that preserved it. Around Rue des Rosiers the old Jewish quarter keeps its bakeries and delis. Elsewhere the mansions hold museums now, from Picasso to Victor Hugo's apartment on Place des Vosges. Sunday is the busy day here, when much of Paris is shut and the Marais is not. It is a neighbourhood best simply walked, without a plan.