The cathedral features a mausoleum in its lower level, containing 1,270 crypts and 4,746 columbarium niches for burials.
Proceeds from the sale of memorials and burial spaces are placed in an endowment fund to support the cathedral.

All past ordinaries of the archdiocese are memorialized in the mausoleum, including a future burial site for Cardinal Roger Mahony, and the remains of several ordinaries and auxiliary bishops who died before the cathedral was built were transferred there.
The tomb of Saint Vibiana was transferred to the cathedral from its previous location above the altar at the Cathedral of Saint Vibiana; the tomb is the centerpiece of the St. Vibiana Chapel located adjacent to the mausoleum.

The crypt mausoleum features a number of stained glass windows that were originally installed in Saint Vibiana's Cathedral.
This idea was suggested by Mario Agustin Locsin, a renowned Liturgical Artist and consultant on the renovation.
The old cathedral windows were restored and two new windows featuring guardian angels created by the Judson Studios were placed at the entrance to the crypt mausoleum.
The cathedral features a mausoleum in its lower level, containing 1,270 crypts and 4,746 columbarium niches for burials. Proceeds from the sale of memorials and burial spaces are placed in an endowment fund to support the cathedral.
All past ordinaries of the archdiocese are memorialized in the mausoleum, including a future burial site for Cardinal Roger Mahony, and the remains of several ordinaries and auxiliary bishops who died before the cathedral was built were transferred there. The tomb of Saint Vibiana was transferred to the cathedral from its previous location above the altar at the Cathedral of Saint Vibiana; the tomb is the centerpiece of the St. Vibiana Chapel located adjacent to the mausoleum.
The crypt mausoleum features a number of stained glass windows that were originally installed in Saint Vibiana's Cathedral. This idea was suggested by Mario Agustin Locsin, a renowned Liturgical Artist and consultant on the renovation. The old cathedral windows were restored and two new windows featuring guardian angels created by the Judson Studios were placed at the entrance to the crypt mausoleum.
Cathedral of Our Lady of the Angels (Los Angeles)