The organ of San Pedro Ozumacín, along with that of San Pedro Quilitongo, may be the last stationary organs in Oaxaca with carved religious symbols on the case. The lower center panel depicts symbols of Saint Peter: the papal miter and the keys to heaven. The upper case is decorated with open work carvings and includes a compass and two squaring tools in medallions above the three towers. Symbols of carpentry, especially when combined with religious imagery on the same organ, are puzzling. Perhaps they were meant to honor the guild that financed the organ’s construction or built the case. The upper case is wider than the lower, more common in Puebla, and the rustic hips seem like filling between the cases rather than a design element. A rectangular (not square Maltese) cross painted on the roller board also indicates a Puebla construction. The organ is disproportionately large for the Ozumacin church with its small choir loft. Even though it is located in a lower side tribune, it still reaches the church roof. It is possible that the organ was acquired from another church dedicated to Saint Peter.