The bottom of this light green square bottle features the Christian ‘Chi Rho’ (ΧΡ) symbol, which is comprised of the first two letters of the name ‘Christ'. This was created by impressing the bottom of the bottle onto a mold onto which the symbol was carved in mirror-opposite of the desired design.
Provenience: First loculus grave on the right side of Tomb 295, Northern Cemetery
Date: 350 – 400 CE
Height: 8.9 cm
Length and width: 4.2 cm
Object Number: 32-15-58
Fleming, Stuart J. "Late Roman Glass at the University of Pennsylvania Museum: A Photo Essay". Expedition. 39, no 2 (1997): 25-41.