A fourth church was constructed in 1873, suffering the collapse of its steeple shortly thereafter. Attempts to reconstruct it failed due to the weakness of the building's structure. Construction of the second cathedral began in 1897, but a part of the building collapsed in 1899. On June 21, 1906, a fire destroyed an area of the town including both cathedrals and the headquarters of the Sisters of the Assumption. Reconstruction began soon afterwards, with the new headquarters of the Sisters of the Assumption and a girls' school being inaugurated in 1908. An agricultural school was added to the Seminary in 1938, and a test centre for the Canadian Armed Forces was established in 1952.