The biggest disadvantage to a post and lintel construction is the limited weight that can be held up, and the small distances required between the posts. Ancient Roman architecture's development of the arch allowed for much larger structures to be constructed. The arcuated system spreads larger loads more effectively, and replaced the post and lintel trabeated system in most larger buildings and structures, until the introduction of steel girder beams in the industrial era. As with the Roman temple portico front and its descendants in later classical architecture, trabeated features were often retained in parts of buildings as an aesthetic choice. The classical orders of Greek origin were in particular retained in buildings designed to impress, even though they usually had little or no structural role.