The people we call Byzantines called themselves as Romans, and the art and architecture of Byzantium between c.500 and c.700 developed from traditions established under the Roman Empire, with regional variations. In Constantinople alone, four major churches stand at least in part. Churches in the Holy Land were also rebuilt in this period. The role of holy portraits (icons) in Orthodox theology developed over the course of the sixth and seventh centuries. Over thirty icons, mostly preserved at the monastery on Mount Sinai, have been attributed to the sixth or seventh century. Little silver coinage was minted between 395 and 615, leaving the silver supply available for plate. A high proportion of preserved Byzantine silver dates from the fourth to the seventh century. Greek religious manuscripts with figural imagery are limited to the fragmentary Cotton Genesis, the Vienna Genesis, with large purple-stained pages each containing a condensed version of Genesis written in gold and silver script, and two Gospel-books.