Letter 14 of Pope Gelasius, written on 11 March 494, was addressed to the bishops of Lucania and Bruttium (ie. nowadays Calabria) and Sicily. They were under Gelasius' direct metropolitan jurisdiction. The long letter is a "decretal", and contains mainly various norms regulating the rights and obligation of clergy.
This is a rare example of a source hinting that some liturgical functions (not specified here) may have been performed by women. For more information on the topic see Otranto 1982.