When the Knights of St. John left Malta, the Conventual Church was entrusted to the Cathedral Chapter to be officiated by them. Today the Chapter is divided in two sections; one officiating at the Cathedral in Mdina and the other at the Co-Cathedral of St.John in Valletta.

Nowadays, the Mdina Cathedral Chapter operates the St Paul’s Cathedral, the Cathedral Archives, the Cathedral Museum and its extension at Palazzo de Piro