HAVANA CATHEDRAL IS ONE OF ELEVEN ROMAN CATHOLIC CATHEDRALS ON THE ISLAND OF CUBA. IT IS LOCATED IN THE Plaza de la Catedral IN THE CENTER OF OLD HAVANA. THE CHURCH WAS BUILT (1777) IN THE BAROQUE ARCHITECTURAL STYLE WITH SEVERAL TUSCAN ELEMENTS, AND IS CONSIDERED ONE OF THE BEST EXAMPLES OLD BAROQUE ARCHITECTURE IN CUBA. THE BUILDING IS MAINLY CONSTRUCTED FROM BLOCKS OF CORAL CUT FROM SOURCES IN THE GULF OF MEXICO'S OCEAN FLOOR. PRESERVED MARINE FOSSILS ARE PRESENT IN THE FACADE.