The frescoes in the Church of the Resurrection at Abu Gosh are magnificent examples of 12th century crusader iconography. As Katherine McCombs demonstrates, by focusing closely on the iconography of the Dormition of the Virgin we can come to a better understanding of the compositional elements, even though many details have been lost over time. We can also see how the fresco would have originally been rendered in the 12th century.
Images of the frescoes at Abu Gosh can be found at this site