This table is an updated, expanded, and geocoded digital version of Sebastian Ristow, Frühchristliche Baptisterien (Münster: Aschendorffsche Verlagsbuchhandlung, 1998). It provides a dataset of 1100+ detailed records of Christian baptisteries from the 3rd until the 12th century. The records are provided with geographic coordinates (at the settlement level, not the building level), construction date range, building orientation, piscina depth, piscina shape, the presence of a ciborium, and other variables. The records' main author is Sebastian Ristow. Under the supervision of David Zbíral, the records have been transferred from the printed book and structured by Hana Hořínková, who also provided most geographic coordinates. Some records have been checked by Sebastian Ristow, who also provided new records not present in the original printed book.