Ironically, Christian Renaissance architecture was based on designs from pagan Greek architecture, and made liberal use of Doric, Ionic and Corinthian orders. Outstanding examples include: the dome of Florence Cathedral (1420-36) and Church of San Lorenzo (1420-69) designed by Brunelleschi; Church of Santa Maria delle Carceri (1485-1506) by Giuliano da Sangallo; Saint Peter's Basilica (1506-1626) by Bramante, Raphael, Michelangelo, Giacomo della Porta, Carlo Maderno and Bernini; Church of San Giorgio Maggiore (1562) by Palladio.
With the fall of Rome and the disintegration of the Roman Empire, Western Europe entered the Dark Ages (400-800), a period of political uncertainty and cultural stagnation. The only possible unifying force was Christianity, but with Rome sacked and the Roman Church under pressure, its influence was limited. Only in Ireland, a country cut off from the European mainland, did Christianity flourish. In fact, Irish Monastic art and culture was critical in keeping alive the ideas of classical antiquity, as well as the message of the Bible. Early Medieval art in Ireland was dominated by the making of illuminated manuscripts, notably the Cathach of St. Columba (c.610), the Book of Durrow (c.650-80), the Lichfield Gospels (c.730), the Echternach Gospels (690-715), the Lindisfarne Gospels (698) and the stunning Book of Kells (800). Because of the country's ongoing tradition of Celtic art, most Irish manuscript illustrators used abstract Celtic designs, rather than figurative imagery preferred by Continental artists. Christian Wall Art