It is a cyclorama, a circular painting, of the Crucifixion of Jesus, showing what the city of Jerusalem might have looked like at the time of his death.
It was painted by Paul Philippoteaux, the panoramist from Paris, assisted by five other painters: Salvador Mège (1854–1915) and Ernest Gros, of Paris, Charles Abel Corwin[1] and Oliver Dennett Grover, of Chicago and Edward James Austen (1850–1930), of London.
The Cyclorama was declared as a bien patrimonial (heritage property/item) by the government of Quebec in August 2017.
[4] The Cyclorama closed its doors in October 2018 after 123 years in operation, having not found a buyer.
The diorama and building housing it remained on sale at that time, pending new owners to move or reopen it.