The size and composition of an audiencia varied over time and place. For example, the first audiencia of Mexico had four oidores, one president and a fiscal, or crown attorney, meeting as only one chamber overseeing both civil and criminal cases. By the 17th century it had grown to two chambers handling civil and criminal cases separately. The civil chamber had eight oidores and one fiscal. The criminal chamber had four alcaldes del crimen (the chamber's equivalent of an oidor) and its own fiscal. In addition the audiencia had sundry other officers such as notaries, bailiffs, and the equivalent of modern public defenders. The smallest overseas audiencias had a composition similar to the early Mexican one.
