The urban fabric of medieval Lucca, most of which survives, includes many fine Romanesque churches facing piazzas, with bichrome or polychrome marble facades and rich sculptural decoration in the so-called Pisan-Luccan style. The most important churches include S Michele in Foro (begun ca. 1143), Piazza S Michele, the upper part of its tall 13th-century facade featuring four tiers of ornamented arcading. [Site of the church was the former Roman forum.]