Stained Glass of the Middle Ages in England and France. Hugh Arnold

      When the enameller's attention was first turned to glasswork, in which different coloured pieces of glass were separated by strips of lead, he must have been struck with the similarity of the two arts, and have perceived that the style of design already developed in enamel could be applied with little change to glasswork.

      This probably explains not only the apparently sudden birth of the art fully formed, but the strongly Byzantine character of the design in the earliest work, the enameller's art having been brought, as we have seen, from Constantinople by way of Venice.[3]

      What, then, is the oldest "stained-and-painted" glass in existence? At Brabourne in Kent there is a small window, of which a coloured tracing may be seen in South Kensington Museum, which may belong to the eleventh century. It consists of a simple pattern of white glass and leading, with small pieces of colour inserted at intervals. Some of these latter, however, have been formed into rosettes of simple design by means of opaque enamel, which is the only painting in the window at all. Whatever the actual date of the window, I think it is not unlikely that it shows the manner in which enamel painting and glazing were first combined.