The pilasters of the triumphal arch have exaggerated imposts bearing fronded modillions over dentillation and egg-and-dart molding, and these decorative features are continued below the apse conch as a defective entablature. This entablature is supported by six ribbed Corinthian pilasters. The top register contains three large rectangular windows, with curtains to obscure the fact that the left hand one is blocked by the adjacent monastery block. Two female allegories (Religion to the left and Fortitude to the right) on the triumphal arch spandrels.