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Reliefs of shields on the Bab al-Nasr (the Gate of Victory) in Cairo, executed in 1087
Source: Islamic Arts and Architecture.
Referenced as figure 159 in The military technology of classical Islam by D Nicolle
159. Reliefs, c.1087 AD, Fāṭimid, in situ, Bāb al Naṣr, Cairo.
Referenced on p15, MAA - 320 Armies of the Caliphates 862-1098 by David Nicolle.
The Bab al-Naşr gate in Cairo, built in 1087.