Puebla de Zaragoza cathedral (Basilica Menor de Nuestra Señora de la Asunción). Construction began in 1575, with completion occurring in 1690, and it is dedicated to Our Lady of the Immaculate Conception. At 69m it's bell towers are Mexico's tallest. The north tower was completed in 1678 and the south one in 1768, Only the north tower has bells including the "La María" bell, with a diameter of 2 meters and weighing approximately eight tons. The cathedral is an element of Puebla de Zaragoza 1987 UNESCO World Heritage Site designation.