The belfry of Oslob church is imposing owing to its size relative to the facade. It was constructed during the time of Fray Mauricio Alvarez (1866-1881). Originally a 5 level structure, the topmost level was destroyed by a very strong typhoon during the time of Fray Gregorio de Santiago (1892-1898). Most of the bells, including the biggest one fell to the ground and cracked.