The epistle side of San Agustin have the following cryptocollateral chapels:
Chapel of Sta. Monica – the chapel was originally dedicated to St. Michael the Archangel and was acquired in 1595 as the final resting place of Colonel Jeronimo Tiado and his family. The baroque retablo was commissionied in 1756.
Chapel of Sto. Tomas de Villanueva – this chapel was acquired by Sebastian Ochoa de Villafranca. The neoclassic retablo may have been placed together with the main altar retablo in 1854, a replacement of a baroque one that is now located along the cloister.
Formerly the Chapel of San Agustin – the retablo of this chapel may have been done during the Alberoni (together with Dibella, they were the one responsible for the trompe l’oeil paintings of the church) renovations of 1875 – 76.
Right, narrow openings at the sides just perpendicular to the walls that connects one cryptocallateral chapel to the next. This can also be found at the gospel side.
The Chapel of San Nicolas de Tolentino is said to be one of the few chapels that has retained its original dedication unlike the other chapels. The baroque retablo was commissioned in 1750. The altar is said to be priviledged: a soul is set free everytime a mass is said here.
There are several Augustinians buried in this chapel including the builder priests who constructed the different towers, convents, churches, a town plaza and a cemetery in Carcar, Cebu; San Nicolas, Ilocos Norte; Anini-y, Antique; Pototan, Iloilo and Betis, Pampanga.
Just below the right belfry, where now a life size image of the Sto. Cristo, crucified, hangs (left), used to be like the other chapel niches, hollow but has an opening that leads to the cloister. It was later closed and held a chapel. However, after the 1880 earthquake, it was filled up with debris together with the other chapel niche below the left belfry to stabilize the facade and the said belltowers.