ミイラ肖像画
The decorated late Roman pieces are usually assumed to have been made in and around Rome, especially in the case of portraits of residents there, but also in the Rhineland around Cologne and Augusta Treverorum, modern Trier, which was a centre for other luxury glass products like cage cups. Alexandria is still thought to have been a major centre, and from linguistic analysis of the inscriptions it has been suggested that the technique, and perhaps the actual artists and craftsmen, reached Rome and Germany from there. Yet it may just be a coincidence of survival that the other large body of "middle-class" portraiture from the period is the Fayum mummy portraits from Egypt. Apart from the Rhineland finds discussed below, small numbers of cut-off vessel bases have been found in northern Italy and modern Hungary and Croatia.