拍品專文
For a sapphire cameo of St. Nikolaos in the Louvre, slightly later than the present example, see no. 201 in Durand, et al., Byzance, L'art byzantin dans les collections publiques françaises. The gold frame ornamented with pearls and granulation is closely paralleled in similarly-framed enamel medallions that were made in imperial workshops in Constantinople and mounted on a variety of objects such as book covers, votive crowns and chalices. See for example the silver gilt and sardonyx chalice in the Procuratoria di San Marco, no. 31 in Evans and Wixom, The Glory of Byzantium, Art and Culture of the Middle Byzantine Era, A.D. 843-1261, and the book cover in the Bibloteca Nazionale Marciana, Venice, no. 41, op. cit.