Saint Merkurios, Nubia
Mural from the Cathedral in Faras, Sudan, 11th century

A larger image of Saint Merkurios, Nubia. Mural from the Cathedral in Faras, Sudan, 11th century

Source: Pinterest

Referenced as figure 183 in The military technology of classical Islam by D Nicolle
183. Fresco from Faras Cathedral, St. Mercurius, late 8th century AD, Nubian, Polish National Museum no. 149672MN, Warsaw (Michal).
K. Michalowski, Faras, Die Kathedrale aus dem Wüstensand, (Zurich 1967).

Illustrations of Costume and Soldiers from Coptic Egyptian and Nubian sources
11th Century Illustrations of Costume & Soldiers

Saint Merkurios, NubiaMural from the Cathedral in Faras, Sudan, 11th century

Saint Merkurios, Nubia
Mural from the Cathedral in Faras, Sudan, 11th century