The 4th is one of the most popular arrondissements and includes the city's islands, the Marais, the Pompidou Centre and more. Seeking calm? Browse our furnished flats on the sleepy Île Saint Louis. Towards the Marais, home of free-spirited bohemians and the Jewish quarter, signs of modernity are springing up amidst the ancient streets. People-watching is excellent here, especially on Sundays when Parisians roam the 4th’s streets and vintage shops.