This church is known by several names. St. Laurens and St. Laurentius both remind of its catholic origins, while it has been also known as Grote Kerk ('great church') since it was confiscated and became a protestant church.
The Fort aan den Hoek van Holland was built between 1881 and 1889 and meant to protect the Rotterdam harbour entrance, the then newly excavated Nieuwe Waterweg. This restored armoured fort is now a museum.
The Maeslantkering is situated in the Nieuwe Waterweg near Rotterdam.
The construction was built for keeping the seawater out. In 1997 these two doors where closed for the first time. it is the intention only to close these doors when the tide is extremely high (about 3.20 meters above normal sea level).
Normaly the doors are opened to let the ships pass to Rotterdam harbour.
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