The faux finished interior of the church incorporates groined vaults in the Gothic architecture style permitting very ample illumination from lateral windows. The steel columns, walls and ceiling were painted by Lorenzo Rocha, Isabelo Tampingco and Félix Martínez to give the appearance of marble and jasper. "Trompe-l'œil" paintings of saints and martyrs by Rocha were used to decorate the interiors of the church. True to the Gothic revival spirit of the church are its confessionals, pulpit, altars and five retablos designed by Lorenzo Guerrero and Rocha. The sculptor Eusebio Garcia carved the statues of holy men and women. Six holy water fonts were constructed for the church, each crafted from marble obtained from Romblon.