the interior very dark. Decoration The Romanesque architectural details of the church's interior are emphasised by the decorative use of colour, with the voussoirs of the nave arcades being of alternately black and white marble, creating stripes, as seen at Orvieto Cathedral. The vault compartments are all painted with lapis lazuli dotted with gold stars, and the vaulting ribs are emphasised with bands of geometric decoration predominantly in red, white and gold. The church is most famous for its largely intact scheme of fresco decoration, the greater part of which dates from the 14th century, and represents the work of painters of the Sienese school, influenced by the Byzantine traditions of Duccio and the Early Renaissance developments of Giotto. The frescoes comprise a Poor Man's Bible of Old Testament cycle, New Testament cycle, and Last Judgement, as well as an Annunciation, a Saint Sebastian, and the stories of a local saint, St Fina, as well as several smaller works. Old Testament cycle The wall of the left aisle had six decorated bays, of which the paintings of the first bay are in poor condition and those of the sixth have been damaged and in part destroyed by the insertion of the pipe organ. The remaining paintings, with the exception of a repainted panel in the sixth bay, are the work of Bartolo di Fredi, and, according to an inscription, were completed around 1356. The paintings are in three registers and proceed from left to right chronologically in each register. Upper level The upper register occupies the lunettes beneath the vault and depicts the story of Creation. Creation of the Firmament Creation of Man Adam names the animals Creation of Eve God commands Adam and Eve not to touch the forbidden fruit The Original Sin (lost) Middle level The second register has ten remaining scenes, with two at the furthest right having been lost with the insertion of the organ. The Expulsion of Adam and Eve from the Garden of Eden (very incomplete) Cain kills Abel (very incomplete) Noah and his family building the Ark Animals entering the Ark Noah and his family giving thanks after the Great Flood The Drunkenness of Noah The departure of Abraham and Lot from the land of the Chaldeans Abraham and Lot go separate ways. Joseph's dream Joseph is put into a well by his brothers Story of Joseph in Egypt (lost) Story of Joseph