Church of Saints Peter and Paul

The Great Synagogue of Luxembourg was first built in 1823, but in 1891, the synagogue gave way to the Congregation of Notre-Dame. In 1894, a new Moorish-style synagogue was built according to the plans of the architects Ludwig Levy and Charles Arendt. In May 1941, it was desecrated by the Gestapo and gradually demolished until 1943, as it became difficult to find a company willing to undertake its restoration. The present synagogue, whose plans were drawn up by architects Victor Engels and René Mailliet, was built between 1951 and 1953.

Notre-Dame Cathedral is a church founded in the 17th century by the Jesuits. The church owes its current size and neo-Gothic style to a 20th century expansion. The crypt of the church contains the tombs of the grand-ducal family.

The Church of the Trinity is located where a chapel was built in 1313. During the siege of the city by the troops of Louis XIV in 1684, the church and the 17th-century monastery surrounding it were destroyed. From 1737 to 1745, a new church was built on exactly the same spot and was the first large Baroque building in the town. Affected by the French Revolution, the church was transformed into a fodder store and as a theatre. Since 1817, it has been used for Protestant services.