This circular church was built in strict Neo-Classical style between 1827 and 1831 by Ferdinand Bonsignore to celebrate the return of Vittorio Emanuele I to Turin after the Congress of Vienna. In the interior of the church there is a sculpture of the Virgin and Child by Andrea Galassi on the main altar. Also of interest is the magnificent crypt which contains the bones of the fallen from the First World War, designed by the architect Giovanni Ricci in 1932.