The water wheel and watermill are the earliest instances of machines harnessing natural forces to replace human muscular labour (apart from the sail).
[8] Apart from its main use in grinding flour, water-power was also applied to pounding grain,[9] crushing ore,[10] sawing stones[11] and possibly fulling and bellows for iron furnaces.
Numerous archaeological finds in the western half of the empire now complement the surviving documentary material from the eastern provinces; they demonstrate that the breakthrough of watermill technology occurred as early as the 1st century AD and was not delayed until the onset of the Middle Ages as previously thought.
[14] Although the prevalence of grain-mills naturally meant that watermilling remained primarily a rural phenomenon, it began gaining importance in urban environments during late antiquity.
[101] Although more rare than the massive millstones, finds of wooden and iron parts of the mill machinery can also point to the existence of ancient watermills.