Caelestini
Martyrological notice
The historical Roman Martyrology commemorates Caelestini on 27 July. The Latin notice identifies the record as pope. The source places the commemoration at Romae.
Historical martyrology witness · Martyrologium Romanum (Latin historical edition)
Romae sancti Caelestini Papae Primi, qui damnavit Constantinopolitanum Episcopnm Nestorium, Pelagiumque fugavit; cujus etiam auctoritate universalis sancta Synodus Ephesina adversus eumdem Nestorium celebrata est.