Work on the Zeeluis and Droogdok in Hellevoetsluis, approx. 1802, c. 1802 - c. 1806 drawing The construction of the sea lock and large dry docks in Hellevoetsluis, under the supervision of hydraulic engineer Jan Blanken, approx. 1802. Face in the construction site where workers are working, in the foreground on the right a few visitors. Netherlands paper pen / brush sluice, weir. dry-dock, floating-dock Hellevoetsluis

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Photo credit: © piemags/rmn / Alamy / Afripics
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