Upon entering the church of Santiago Teotongo, a museum of Oaxaca baroque art, the beautiful organ is immediately visible in its tribune high up on the right. Richly carved volutes painted and gilded in red, green, and gold tones adorn the upper case of the organ. The monogram of the Virgin Mary is encircled in the crest above the central tower. The lower case is austere and undecorated, since it was not visible from the church floor below. During the 20th century, the entire case was painted with red enamel, replicating the underpainting applied sometime after the original construction. The carvings were also retouched, which is why they look so dazzling. The organ has relatively few stops for its size. Two of the six are reed stops and the others are pitched high, including a 2´ three-rank mixture, so the organ must have had a brilliant sound. It seems to have been built and modified in stages with the reed stops and accessory bird stop added after the original construction. It resembles the unpainted but more complete organ in Yucucui dated 1743. 

Five carved wooden statues, four trumpeter angels and the larger trumpeter archangel Saint Michael, once stood on the bases of the organ's towers. Pipes connected to the horizontal reed stop (clarín) ran through their bodies to trumpets (missing) held up in playing position and attached to their O-shaped mouths. Statues of saints or angels which adorned the organs in the Cathedral and the Basilica de la Soledad have been documented during this period. However, only those in Teotongo have been preserved, and it is unknown if any of the others could sing.