Apart from Anglo-Saxon architecture, which survives entirely in churches, with only a handful of largely unaltered examples, monumental stone sculpture survives in large stone crosses, an equivalent to the high crosses of the Celtic areas of Britain. Most sculpture was probably once painted, clarifying the designs, which are mostly in relatively low relief and not finished with great precision, and now almost all badly worn and weathered. Dating is usually difficult. Sculpture in wood was very likely more common, but almost the only significant large survival is St Cuthbert's coffin in Durham Cathedral, probably made in 698, with numerous linear images carved or incised in a technique that is a sort of large-scale engraving. The material of the earliest recorded crosses is unknown, but may well have been wood. From various references (to its destruction by Christians) there would seem to have been a tradition of Anglo-Saxon pagan monumental sculpture, probably in wood, of which no examples remain (as opposed to later Anglo-Scandinavian pagan imagery), and with which the crosses initially competed.