Existing Roman features in Seville itself include the remains exposed in situ in the underground Antiquarium of the Metropol Parasol building, the remnants of an aqueduct, three pillars of a temple in Mrmoles Street, the columns of La Alameda de Hrcules and the remains in the Patio de Banderas square near the Seville Cathedral. The walls surrounding the city were originally built during the rule of Julius Caesar, but their current course and design were the result of Moorish reconstructions.[23]