The Hoogheemraadschap van Rijnland is the oldest water authority in the Netherlands, having received commission to coordinate protection of the land from flooding in 1248 from Count William II of Holl
Gemeenlandshuis of the Hoogheemraadschap van Rijnland on the Breestraat in Leiden
Count William II of Holland and Zeeland Granting Privileges in 1255 to the local Dike-wardens of Spaarndam by Caesar van Everdingen, 1654, originally commissioned for the Gemeenlandshuis Zwanenburg in Halfweg, and today in the collection of the Gemeenlandshuis Rijnland in Leiden
Heraldic shields of the Halfweg Water Board members in 1646, the year that the Water Board built this house for board meetings, on the facade of the Gemeenlandshuis Zwanenburg in Halfweg.
Water board (Netherlands)
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In the Netherlands, a water board, water council or water authority is a regional governing body solely charged with the management of surface water in the environment. Water boards are independent of
Gable stone on a 1645 gemeenlandshuis in Halfweg
Heraldic shields of Hoogheemraadschap Delfland at façade of Gemeenlandshuis Delft, date 1645, the year this house has been bought for board administration and meetings.
Waterpumping windmills built in 1672 at Driemanspolder near Leiden