Keywords: Chi-rho mensa Louvre Ma 3023.jpg Chi Rho symbol detail from a mensa altar stone Limestone third quarter of the 4th century From Khirbet Um El ™Amad Algeria Chrisme détail d'une mensa pierre d'autel Calcaire troisième quart du IVe siècle Provenance Kherbet Oum el Ahdam Algérie H 1 27 m 4 ft 1 ¾ in W 1 32 m 4 ft 3 ¾ in D 0 3 m 11 ¾ in Museum Louvre Department of Greek Etruscan and Roman Antiquities Denon wing ground floor room 28 object history credit line Excavated by August Audollent and Joseph Letaille; gift 1890 accession number Ma 3023 MNC 1287 Jastrow 2007 other versions 4th-century reliefs 4th-century works in France Chi Rho Paleochristian art Roman antiquities in the Louvre - Room 28 Round ornaments |