 Masonry of all types was used for ancient Greek buildings, including rubble, but the finest ashlar masonry was usually employed for temple walls, in regular courses and large sizes to minimise the joints.The blocks were rough hewn and hauled from quarries to be cut and bedded very precisely, with mortar hardly ever being used.Blocks, particularly those of columns and parts of the building bearing loads were sometimes fixed in place or reinforced with iron clamps, dowels and rods of wood, bronze or iron fixed in lead to minimise corrosion.