Filming on the construction of the dome of St. Joseph's Oratory on the Mont Royal Workers hoist a stone. Oratory with the unfinished dome. Scaffolding. Numbered stones. Workers working on the installation of concrete blocks or granite. Workers working on the installation of concrete blocks or granite (shot from the skylight). Structure of the dome. Workers on the structure of the dome. Dome under construction. Tinsmiths at work on the roof. Installation of copper sheets. Installation of a block of granite. Structure. Tinsmiths at work. Structure of the dome. Crowd gathered in front of the Oratory at the ceremony of blessing of the stone in 1940. Keywords: ARCHITECTURE,CONSTRUCTION,MONTREAL,ST-JOSEPH'S ORATORY