Saint-Joseph-des-Carmes, Baroque church in 6th arrondissement, France.

Saint-Joseph-des-Carmes is a Baroque church in the 6th arrondissement of Paris with three levels that diminish toward the top and a triangular gable. It houses one of the earliest domes constructed in the city and displays the architectural style typical of its period.

The first stone was laid on 20 July 1613 by Queen-Regent Marie de Médicis, and the exterior was largely finished by 1620, when the first mass was celebrated on 19 March, the feast of Saint Joseph. The church was consecrated on 21 December 1625 by Léonor d'Étampes de Valençay, Bishop of Chartres. It was the first church in Paris dedicated to Saint Joseph. In 1792 it became a Revolutionary prison, and since 1875 it has belonged to the Institut catholique de Paris.

The church is still used by the Catholic Institute of Paris and serves as a parish church. Visitors can see the master altar commissioned by Chancellor Pierre Séguier in 1633, with a marble relief of the Last Supper placed there during the Revolution. The heart of Archbishop Denys Affre, killed on the barricades in 1848, is kept in the left transept.

The church is located on Rue de Vaugirard and welcomes visitors free of charge. Audio guides accessible via mobile phone scanning help explain the architecture and artworks inside.

The garden behind the church was the site of the September Massacres: 115 priests were killed there over two hours on 2 September 1792, the largest number at any single site that day. The stairway down to the garden is now called the Stairway of Martyrs.