Guitar-type instrument depicted on an ancient Roman sarcophagus in marble, British Museum number 1805,0703.132

This a photograph of a subsection of an ancient Roman sarcophagus. The sarcophagus, done in marble, is at The British Museum. It arrived there as part of the Townley Marbles Collection. Its catalog number at The British Museum is 1805,0703.132. The British Museum website has a set photos of the complete sarcophagus at http://www.britishmuseum.org/research/collection_online/collection_object_details.aspx?objectId=459993&partId=1 .