Lake Flevo, a large lake that became the Zuiderzee, Netherlands.
Since the 18th century, the people from Genemuiden have been producing floor mats made of the bulrush that grows on the shores of the Zuiderzee.
Until the beginning of the 17th century, the primary waterway between Amsterdam and Haarlem was the IJ, a bay of the Zuiderzee.
However, since the formation of the Zuiderzee and obstruction from the Afsluitdijk, the IJssel no longer flows into its estuary, the Vlie, now restricted in meaning and referring only to the strait separating the islands of Vlieland (itself named after the Vlie strait) and Terschelling.
Cornelis Lely, Dutch engineer and statesman, who designed and realised by law the Zuiderzee Works that made the Zuiderzee into the lake IJsselmeer
The Zoudenbalchs were also Lords of the island of Urk in the Zuiderzee (now IJsselmeer) for over a century (1476–1614), and as such played a key role in the life of that community during troubled times in the 16th century.