A fire damaged the cathedral in 1532, destroying the roofs. After that the eastern towers were raised. The fire also destroyed the three-aisled nave of the collegiate church dedicated to Mary next door to the cathedral, of which today only the choir remains. The collegiate church has its own cloister explaining the temporary presence of two of them, one to the cathedral's south and one to the north. The northern cloister is not extant but served to house the cathedrals clergy prior to the collegiate church's destruction.