 The cathedral has 25 bells — eighteen hang in the east bell tower and seven in the west tower . The largest bell is named the Santa Maria de Guadalupe and weighs around 13 @,@ 000 kilograms ( 29 @,@ 000 lb ) . Other major bells are named the Doña Maria , which weighs 6 @,@ 900 kilograms ( 15 @,@ 200 lb ) , and La <unk> ( " the <unk> one " ) , named so because of its harsh tone . Doña Maria and La <unk> were placed in 1653 while the largest bell was placed later in 1793 . 
