It was built as a roman cathedral between 1046 and 1058 and a second chapel was built later on around 1257 which was later added to the overall cathedral. Then 30 years later the cathedral was undergoing reconstruction and the main body of the building was demolished to be replaced by an impressive gothic structure. Only the chapel remained untouched as an original element of the cathedral today.

Construction  for this sgreat catheddral was veyr slow and in fact it wa sonly completely finished in 1913 when the when the final central spire was completed.