A naturally built cave, which was beneath the oldest parish church in Malta (Rabat), was altered into a crypt, which was the typical underground Christian cemeteries of the time. The underground catacombs are very extensive and hold various galleries and graves of different types. The crypt and catacombs form part of one historical complex, which includes a church as well as an adjacent museum. A nice variety old and unique fescoes of Malta, are found here. During the persecution of Christians, which was ruled by the Roman Emperor Traijanus Decius 249-251 AD, St Agatha fled from Sicily and took refuge in Malta for a few years. She then returned to Sicily, where she was then arrested and condemned to torture and imprisonment.