For most of history, architects, or as they are usually known, master builders, are working craftsmen in the building trade, usually masons (but occasionally carpenters) who have worked their way to a position of respect. They are also administrators who hire and coordinate crews of masons, carpenters and other craftsmen. The master builder works out the overall building design in cooperation with the sponsors of the building, although precise details of decoration and construction are left to subordinates and the work crew itself.