St. John's Co-Cathedral in Valletta's centre is a true baroque masterpiece. While rather plain from the outside, once you step between its Doric columns through the portal, the true splendour of this Roman Catholic cathedral is revealed. Impressive wood carvings and tapestries decpict scenes from the life of Saint John. Eight chapels flank the cathedral's sides, themselves full of elaborate decorations.
St. John's also features a number of important art pieces, such as The Beheading of St John the Baptist, one of Caravaggio's most significant works. Marble tombs of about 400 knights, and sarcophagus of Grand Masters are also among the baroq masterpieces. If you want more, pay a visit to the adjacent cathedral museum. A range of garments, tapestries as well as further paintings are on display.