Fodor's Expert Review American Church
Not to be confused with the American Cathedral, across the river at 23 avenue George V, this pretty neo-Gothic Protestant church was built between 1927 and 1931. It features a pair of Tiffany stained-glass windows—a rare find in Europe. Besides ecumenical services, the church hosts architectural tours, free classical and acoustic concerts, plus popular exercise classes (including yoga). You can check event listings and download a self-guided PDF tour at the church website.