The temple’s ornamentation, in general, is rather sober. The brick masonry is stuccoed and uses an array of colors that go from cream to terracotta, in pastel tones and some details in gold. Walls, domes and pendentives are all ornamented with moldings of vegetation and geometric designs.

The altars keep the temple’s Roman style and the niches are painted, imitating the marble. Most of the altars are empty, presumably due to the looting. The few images that are left are located without any established order and seem to have no fixed place; many of these image are plaster sculptures and some others are made of polychromatic wood. In the upper top panel to the doors of the accesses through the transept, some paintings with religious motifs can be seen.

The altarpiece of the High Altar made in marble, exhibits the figure of the Patron Saint of the temple, Saint Isidro, made in wood and that is safeguarded by the figures of some angels that seem to be made of plaster. The High Altar, previously made in marble, was replaced by a white and green board made of MDF trupan board painted to resemble marble, of very bad manufacturing and a gross technique, which is ridiculously ugly.

In the attic, there is a battered broken-down organ.