Chiusa di Casalecchio di Reno, Medieval water lock in Casalecchio di Reno, Italy
The Chiusa di Casalecchio di Reno sits on the Reno River and regulates water flow through gates and channels at the transition from mountains to plains. The structure contains multiple water chambers and openings that control the water level and direct the current.
The lock was built in 1183 and relocated in 1360 under Cardinal Egidio Albornoz's direction to improve the region's water management. It became key infrastructure for Bologna's development and that of surrounding areas.
The lock sustained Bologna's silk industry from the 13th to 18th centuries by powering mills throughout the canal network. It allowed an entire region to benefit from the trade of precious fabrics.
The site is accessible via paths along the Reno River where you can explore the lock structure and canal networks. Local organizations offer guided visits to help you understand how the water control systems work.
UNESCO recognized this hydraulic engineering site in 2010 as a Peace Messenger Heritage location, honoring its role in peaceful cooperation between communities. The recognition shows how water management reduced resource conflicts over centuries.
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