Due to the building being severely damaged during the 1779–1783 Great Siege, in 1790 the then Governor of Gibraltar Sir Robert Boyd offered to rebuild the cathedral in return for part of the land on which the building originally stood in order to re-route Main Street. The route was re-modelled in 1801 so that Main Street could be straighter. (This drastic change has also been credited to the Governor, Charles O'Hara.) The reconstruction took place in 1810 and the opportunity was also taken to widen Main Street. The clock tower was added in 1820 and in 1931 restoration work was carried out on the cathedral and the current west façade erected to replace the poorer one built in 1810.