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Hoogheemraadschap Van Rijnland
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 Holland and Zeeland. The council conducts surface water management activities in the area known as Rijnland in the province of South Holland. The Netherlands has 21 Waterboards or ''Waterschappen'' acting independently from administrative governing bodies to manage Dutch water control activities along with the fine-mazed polder systems. History The first steps towards a governing organisation of water management were taken in the 12th century when the Oude Rijn river silted shut at the North Sea mouth near Katwijk. Even though the Lek river some 60 kilometer upstream had become the main Rhine water drainage channel, the populated area along Oude Rijn, from Utrecht to Leiden, suffered from flooding because the river water couldn't flow properly into the sea anymore. To deal with this p ...
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Gemeenlandshuis - Leiden
A Gemeenlandshuis, or Waterschapshuis is a building that is (or was formerly used as) the headquarters of one of the Waterboards of the Netherlands. History Early flood control in the Netherlands is often called the ''Teerschouw'', which loosely translated means "consumption during observation".Dutch dictionary definition
of the word ''Teerschouw'' This technique was a periodic check of the local dike system by the Dike-reeve and his men. If they found a problem, they would simply go to the nearest house or inn, and stay there for free until the problem was fixed. This was a fairly direct and simple form of

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Haarlem Lake
Haarlemmermeer () is a municipality in the west of the Netherlands, in the province of North Holland. Haarlemmermeer is a polder, consisting of land reclaimed from water. The name Haarlemmermeer means 'Haarlem's lake', referring to the body of water from which the region was reclaimed in the 19th century. Haarlemmermeer's main town is Hoofddorp, which has a population of 76,660. Hoofddorp, along with the rapidly growing towns of Nieuw-Vennep and Badhoevedorp, are part of the Randstad agglomeration. The main international airport of the Netherlands, Schiphol, is located in Haarlemmermeer. History The original Haarlemmermeer lake is said to have been mostly a peat bog, a relic of a northern arm of the Rhine which passed through the district in Roman times. In 1531, the original Haarlemmermeer had an area of , and near it were three smaller lakes: the Leidsche Meer (Leiden Lake), the Spiering Meer, and the Oude Meer (Old Lake), with a combined area of about . The four lakes were for ...
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Haarlemmertrekvaart
The Haarlemmertrekvaart ŒhaËrlÉ›mÉ™rˈtrÉ›kfaËrt(Haarlem's Tow-Canal) is a canal between Amsterdam and Haarlem in the province of North Holland, the Netherlands. It was dug in 1631, making it the oldest tow-canal in Holland. Travel on such canals was historically done by barges (or ''trekschuit'' in Dutch) which were towed by animals (and sometimes by man-power) on a path along the canal's edge (towpath). History Until the beginning of the 17th century, the primary waterway between Amsterdam and Haarlem was the IJ, a bay of the Zuiderzee. The land route was over the twisty dike along this bay. In 1631 construction began and the canal was dug in a virtually straight line to guarantee the shortest route. It shortened the waterway from Haarlem to Amsterdam considerably. Until that time, boats needed to travel up the Spaarne river to pass the narrow sluice gate at Spaarndam, to reach the IJ. Similarly, the towpath shortened the route considerably for land traffic. Prior to this ...
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Gemeenlandshuis
A Gemeenlandshuis, or Waterschapshuis is a building that is (or was formerly used as) the headquarters of one of the Waterboards of the Netherlands. History Early flood control in the Netherlands is often called the ''Teerschouw'', which loosely translated means "consumption during observation".Dutch dictionary definition
of the word ''Teerschouw'' This technique was a periodic check of the local dike system by the Dike-reeve and his men. If they found a problem, they would simply go to the nearest house or inn, and stay there for free until the problem was fixed. This was a fairly direct and simple form of

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Hof Van Holland
The Hof van Holland, Zeeland en West-Friesland (; usually shortened to Hof van Holland in the literature, and translated in English literature as "(High) Court of Holland") was the High Court of the provinces of Holland, West Friesland and Zeeland, instituted as a separate entity of the government of the Counties of Holland and Zeeland in 1428, under the Burgundian and Habsburg Netherlands, and continued with little change under the Dutch Republic, Batavian Republic, and the Kingdom of Holland, until its dissolution in 1811 by the First French Empire. It should not be confused with the ''Hoge Raad van Holland en Zeeland'' which was the supreme court, founded in 1582 by the States-General of the Netherlands and intended for the entire Dutch Republic. The ''Hof'' was in practice the main Appellate court in Holland and Zeeland, and in number of cases-handled the most important in the entire Dutch Republic (in comparison to the sister-provincial courts like the ''Hof van Friesland'') ...
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Caesar Van Everdingen
Cesar Pietersz, or Cesar Boetius van Everdingen (1616/17 – buried 13 October 1678), older brother of Allart van Everdingen and Jan van Everdingen, was a Dutch Golden Age portrait and history painter. Biography He was born in Alkmaar and educated in Utrecht, where he learned to paint from Jan Gerritsz van Bronckhorst.Cesar van Everdingen Biography
in ''De groote schouburgh der Nederlantsche konstschilders en schilderessen'' (1718) by , courtesy of the < ...
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Haarlem
Haarlem (; predecessor of ''Harlem'' in English) is a city and municipality in the Netherlands. It is the capital of the province of North Holland. Haarlem is situated at the northern edge of the Randstad, one of the most populated metropolitan areas in Europe; it is also part of the Amsterdam metropolitan area, being located about 15 km to the west of the core city of Amsterdam. Haarlem had a population of in . Haarlem was granted city status or '' stadsrechten'' in 1245, although the first city walls were not built until 1270. The modern city encompasses the former municipality of Schoten as well as parts that previously belonged to Bloemendaal and Heemstede. Apart from the city, the municipality of Haarlem also includes the western part of the village of Spaarndam. Newer sections of Spaarndam lie within the neighbouring municipality of Haarlemmermeer. Geography Haarlem is located on the river Spaarne, giving it its nickname 'Spaarnestad' (Spaarne city). It is situated a ...
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Sugar City 6
Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose, fructose, and galactose. Compound sugars, also called disaccharides or double sugars, are molecules made of two bonded monosaccharides; common examples are sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (two molecules of glucose). White sugar is a refined form of sucrose. In the body, compound sugars are hydrolysed into simple sugars. Longer chains of monosaccharides (>2) are not regarded as sugars, and are called oligosaccharides or polysaccharides. Starch is a glucose polymer found in plants, the most abundant source of energy in human food. Some other chemical substances, such as glycerol and sugar alcohols, may have a sweet taste, but are not classified as sugar. Sugars are found in the tissues of most plants. Honey and fruits are abundant natural sources of simple sugars. Sucrose is ...
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Dijkgraaf (official)
A (), sometimes called a , is the chair of a Dutch water board. The dijkgraaf is the equivalent of a mayor in local government and a King's Commissioner in provincial government, chairing both the legislative and executive council, while having both ceremonial and representational roles as well as their own portfolios. The term goes back to pre-medieval days. Literally the term means "Dike count", like other titles ending in (equivalent to English: -grave and german: -graf) of feudal origin, but remained a functional official. The government bodies in the Netherlands today in order of rank are: #National #Provincial #Municipal #Water boards. In medieval times and earlier however, the water boards were the same as municipal, and since it was a country of duchies, the Water board () was in governmental terms the equivalent of a city (), and thus also the highest form of government. References Dijkgraafdefinition (Dutch) Water Canon(English version) website of The Ministry of ...
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Spaarndam
Spaarndam is a small village in the province of North Holland, the Netherlands, on the Spaarne river and the IJ lake. The oldest part of the village, on the western side of the Spaarne, belongs to the municipality of Haarlem; the newer part on the eastern side is a part of the municipality of Haarlemmermeer. The village is built around a dam in the river, which is also the division line of the two municipalities. Spaarndam was created around a dam where the river Spaarne flows into the IJ. This dam was built here by count Floris V of Holland in 1285. The village collected tolls at this dam, and people made their living from fishing. From 1812 to 1927, the western part of Spaarndam was an independent municipality. The village has some tourism, and many people commute to Amsterdam and Haarlem. Spaarndam has always been strongly connected to water. Besides the river and the fishing, it is also famous because of a story within the 1865 American novel, ''Hans Brinker or th ...
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Wassenaar
Wassenaar (; population: in ) is a municipality and town located in the province of South Holland, on the western coast of the Netherlands. An affluent suburb of The Hague, Wassenaar lies north of that city on the N44/A44 highway near the North Sea coast. It is part of the Haaglanden region and the Rotterdam–The Hague metropolitan area. The municipality covers an area of , of which is covered by water. Wassenaar is home to some of the Netherlands' richest residential neighborhoods as well as the country's most expensive street, the ''Groot Haesebroekseweg''. History There are rumours that the 12th-century Romanesque church in Wassenaar lies on the spot where the Northumbrian missionary Willibrord once landed in the Netherlands; the high dunes to the west were not formed until later. Wassenaar long remained an unremarkable little town, known only as the home of the House of Wassenaer. It only began to gain notoriety in the 19th century when Louis Bonaparte ordered the co ...
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Amsterdam
Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population of 907,976 within the city proper, 1,558,755 in the City Region of Amsterdam, urban area and 2,480,394 in the Amsterdam metropolitan area, metropolitan area. Located in the Provinces of the Netherlands, Dutch province of North Holland, Amsterdam is colloquially referred to as the "Venice of the North", for its large number of canals, now designated a World Heritage Site, UNESCO World Heritage Site. Amsterdam was founded at the mouth of the Amstel River that was dammed to control flooding; the city's name derives from the Amstel dam. Originally a small fishing village in the late 12th century, Amsterdam became a major world port during the Dutch Golden Age of the 17th century, when the Netherlands was an economic powerhouse. Amsterdam is th ...
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