The Church of St. Augustine (French: Église Saint-Augustin de Paris)) (French pronunciation: [eɡliz sɛ̃t‿oɡystɛ̃ də paʁi]) is a Catholic church located at 46 boulevard Malesherbes in the 8th arrondissement of Paris. The church was built between 1860 and 1871 by the Paris city chief architect Victor Baltard. It was the first church in Paris to combine a cast-iron frame, fully visible, with stone construction. It was designed to provide a prominent landmark at the junction of two new boulevards built during Haussmann's renovation of Paris under Napoleon III.
In 1886, Saint-Augustin was the site of the conversion of Charles de Foucauld, who was canonised as a saint by Pope Francis on 15 May 2022. The church includes a chapel dedicated to Foucauld, in which is preserved the confessional where he returned to the Catholic Church.
