Fodor's Expert Review Hôtel de Sully

This early Baroque gem, built in 1624, is one of the city's loveliest hôtels particuliers (grand town houses). Like much of the area, it fell into ruin until the 1950s, when it was rescued by the institute for French historic monuments (the Centre des Monuments Nationaux), which is based here. The renovated headquarters aren’t open to the public, but you're welcome to enjoy the equally lovely garden. Stroll through it, past the Orangerie, to find a small passage into nearby Place des Vosges. Sully's best buddy, King Henri IV, would have lived there had he not been assassinated in 1610. An on-site bookstore (with a 17th-century ceiling of exposed wooden beams) sells specialized English-language guides to Paris.