6. Detail of the base of St Lawrence trampling the heretic king, by Francesco Alfieri. Trapani, Sicily, mid-sixteenth century. Coral, gilt-bronze and enamel, diameter approx. 14 cm. (San Lorenzo, El Escorial).
Western art unattributed:
1. The Benetier of Charlemagne. Sardonyx bowl. Byzantine mid-tenth century, mounted on a gold and enamel monstrance foot, Spanish or Italian, before 1571, 23.2 by 26.1 cm. (Private collection; on loan to the National Museums of Scotland).
Western art unattributed:
2. Detail of the sardonyx bowl in Fig.1.
Western art unattributed:
3. The Chalice of the Emperor Charles IV. Sardonyx bowl. Byzantine, mid-tenth century, mounted in Germany in 1350. Gold, enamel and pearls, 21.2 by 14.8 cm. (Treasury of St Vitus Cathedral, Prague).
Western art unattributed:
4. The Chalice of the Emperor Romanos I. Byzantine, before 944. Sardonyx, gold, enamel and pearls, 23.7 by 18.1 cm. (Treasury, St Mark’s, Venice).
Western art unattributed:
5. Detail of the gold and enamel mount in Fig.1.
Western art unattributed:
7. Photograph of the Red Room, Halton, Buckinghamshire. 1884. (Private collection).