Petra, Baptystery at the Byzantine Church

The baptistery located to the west of the "Petra Church"  is a tree-room complex. In the centre is a cross-shaped baptismal font under a four-columned canopy.

Sources:

1. Patricia Maynor Bikai, "The Churches of Byzantine Petra". Near Eastern Archaeology. 65 (4): 2002,  271–27 -https://www.jstor.org/stable/3210859