Genoa's zebra-striped Gothic–Romanesque cathedral owes its continued existence to the poor quality of a British WWII bomb that failed to ignite here in 1941; it still sits on the right side of the nave like an innocuous museum piece.
The cathedral, fronted by three arched portals, twisting columns and crouching lions, was first consecrated in 1118. The two bell towers and cupola were added later in the 16th century.
Inside, above the central doorway, there's a great lunette with a painting of the Last Judgment, the work of an anonymous Byzantine painter of the early 14th century. In the sacristy, the Museo del Tesoro preserves various dubious holy relics, including the medieval Sacro Catino, a glass vessel once thought to be the Holy Grail. Other artefacts include the polished quartz platter upon which Salome is said to have received John the Baptist's head, and a fragment of the True Cross.