At the west end of the church , a 110 @-@ foot ( 34 m ) belltower rises above the main entrance . The tower is topped with a copper dome , capped with a cross . It contain three bells , weighing 900 , 1 @,@ 600 , and 2 @,@ 500 pounds ( 410 , 730 , and 1 @,@ 130 kg ) . The tower 's clock have four six @-@ foot ( 1 @.@ 8 m ) dials . Below the tower , a flight of seventeen steps ascends to the church 's main entrance , via a set of double doors through a semicircular archway .