The main sites within the bounds of these defences are the Gosbecks farmstead, the Sheepen industrial area and the Lexden burials. The Gosbecks site consists of a large, high-status farmstead, believed to be the home of the tribal chieftains of Camulodunon. Part of the Gosbecks complex is a large, square enclosure surrounded by a deep, wide ditch. This has been interpreted as part of a possible religious site, as during the Roman period a large temple was built in the middle of this enclosure. The Sheepen site, located around what is now St Helena School on the banks of the River Colne, was a large industrial and port zone, where extensive iron and leather working activity was carried out, as well as an important coin mint. Two coins minted at Sheepen, one found in Colchester in 1980 and another found at Canturbury in 1978, depict boats, and are the only known depictions of sailing vessels from Iron Age Britain. Amphorae containing imported goods from the continent have been found at Sheepen, as have pieces of imported Samian pottery.