 Roman triumphal arches, however, typically have a massive, solid attic (upper level), often filled with a dedicatory inscription and sculptural decoration.In addition, Roman arches typically supported major stone or bronze statuary, often including a quadriga (four-horse chariot) or similar at top center.As Willers notes, the design of the Arch of Hadrian has a very refined upper level that does not allow the mounting of major decoration on top of the attic.