Cayenne centres on its main commercial street, the Avenue Général de Gaulle. At the east end of the avenue near the coast is the Place des Palmistes and the Place de Grenoble (also known as the Place Léopold Héder). Most of the official buildings are located in this area: the Hôtel de Ville (the town hall) built by Jesuits in the 1890s, the Post Office, the Préfecture, residence of French Guiana's Préfect, and the Musée Départmental Franconie. To the west of this area lies Fort Cépérou, built in the 17th century, though now mostly in ruins. To the south lie the Place du Coq and Place Victor Schoelcher (named in honour of the anti-slavery activist) and a market.