 Financial and administrative records indicate the presence of organs in churches dates back to the 15th century, although their precise use is not known.Many first-person accounts of church services from the 15th and 16th centuries imply organ accompaniment in some portions of the liturgy, as well as indicating that the unaccompanied practice of the "Cappella Sistina" was somewhat unusual.By early in the 16th century, it seems that accompaniment by organ at least in smaller churches was commonplace, and commentators of the time lamented on occasion the declining quality of church choirs.