Monumentum Serapis head of Walbrook The head of Serapis found at Walbrook, London, is decorated with stylised olive branches. PublishedThe New Mithraeum14 Jun 2009Updated on 15 Jan 2022 The full article is reserved for our members. Log in or create a free account to access the entire site. Large marble head of Sarapis with modius, decorated with stylised olive-branches. In the same time a colossal right hand holding a part of a stick (oar?) was found.