Ireland's Earliest Windmills: 12th-Century Post Mills
First Windmills in Ireland
Windmills arrived in Ireland in the 12th century with Anglo-Norman settlement. The earliest type: post mills — entire wooden body rotates on a central post to face the wind.
Two Surviving Early Examples
| Dysart Windmill (Co. Tipperary) | Roscrea Windmill (Co. Tipperary) |
|---|
| ~12th century (believed) | 13th century |
| Post mill | Tower mill (stone tower, rotating cap) |
| Thatched roof, wooden cap | Stone tower, wooden cap |
| Cloth sails | Wooden sails |
| Still standing | Still standing |
Historical Role
- Corn grinding (oats, barley, wheat) — staple food processing
- Manorial obligation: tenants required to use lord's mill (multure)
- Also: water pumping, malt crushing, later — linen scutching
- Peak: ~200+ windmills in 18th–19th century Ireland
Decline & Legacy
- Steam engines (early 1800s) → roller milling → centralized factories
- Windmills abandoned, demolished, converted
- Survivors: ~10–15 substantial remains; few restored (e.g., Blennerville, Co. Kerry — working)
- Place names: "Milltown," "Windmill Hill," "Mullinavat" (mill of the stick)
Dysart & Roscrea Today
Both are National Monuments. Dysart is a rare surviving medieval post mill; Roscrea shows the tower-mill evolution. They represent the dawn of mechanical power in Ireland—pre-dating steam by centuries.
Wanderlust World