or thought to have been be painted by Saint Luke or other figures, was held to have a status not far off that of a scriptural text. They could be copied, but not improved upon. As a concession to Iconoclast sentiment, monumental religious sculpture was effectively banned. Neither of these attitudes were held in Western Europe, but Byzantine art nonetheless had great influence there until the High Middle Ages, and remained very popular long after that, with vast numbers of icons of the Cretan School exported to Europe as late as the Renaissance. Where possible, Byzantine artists were borrowed for projects such as mosaics in Venice and Palermo. The enigmatic frescoes at Castelseprio may be an example of work by a Greek artist working in Italy. The art of Eastern Catholicism has always been rather closer to the Orthodox art of Greece and Russia, and in countries near the Orthodox world, notably Poland, Catholic art has many Orthodox influences. The Black Madonna of Częstochowa may well have been of Byzantine origin – it has been repainted and this is hard to tell. Other images that are certainly of Greek origin, like the Salus Populi Romani and Our Lady of Perpetual Help, both icons in Rome, have been subjects of specific veneration for centuries. Although the influence has often been resisted, especially in Russia, Catholic art has also affected Orthodox depictions in many respects, especially in countries like Romania, and in the post-Byzantine Cretan School, which led Greek Orthodox art under Venetian rule in the 15th and 16th centuries. El Greco left Crete when relatively young, but Michael Damaskinos returned after a brief period in Venice, and was able to switch between Italian and Greek styles. Even the traditionalist Theophanes the Cretan, working mainly on Mount Athos, nevertheless shows unmistakable Western influence. Many Eastern Orthodox states in Eastern Europe, as well as to some degree the Muslim states of the eastern Mediterranean, preserved many aspects of the empire's culture and art for centuries afterward. A number of states contemporary with the Byzantine Empire were culturally influenced by it, without actually being part of it (the "Byzantine commonwealth"). These included Bulgaria, Serbia, and Kievan Rus', as well as some non-Orthodox states like the Republic of Venice and the Kingdom of Sicily, which had close ties to the Byzantine Empire despite being in other respects part of western European culture. Art produced by