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Johan de Witt

Johan de Witt is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Johan de Witt rather than just read about it. In short: Johan de Witt (24 September 1625 – 20 August 1672) was a Dutch statesman and mathematician who was a major political figure during the First Stadtholderless Period, when flourishing global trade in a period of rapid European colonial expansion made the Dutch a leading trading and seafaring power in Europe, commonly referred to as the Dutch Golden Age. De Witt was elected Grand Pensionary of Holland, and together wit…

Johan de Witt — main illustration
Johan de Witt — illustration

Key takeaways

  • Johan de Witt belongs to mathematics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Johan de Witt to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Johan de Witt from memory before moving on to harder problems.

Reference excerpt

Johan de Witt (24 September 1625 – 20 August 1672) was a Dutch statesman and mathematician who was a major political figure during the First Stadtholderless Period, when flourishing global trade in a period of rapid European colonial expansion made the Dutch a leading trading and seafaring power in Europe, commonly referred to as the Dutch Golden Age. De Witt was elected Grand Pensionary of Holland, and together with his uncle Cornelis de Graeff, he controlled the Dutch political system from around 1650 until the Rampjaar (Disaster Year) of 1672. This progressive cooperation between the two statesmen, and the consequent support of Amsterdam under the rule of De Graeff, was an important political axis that organized the political system within the republic. As a leading republican of the Dutch States Party, De Witt opposed the House of Orange-Nassau and the Orangists and preferred a shift of power from the central government to the regenten. However, the Dutch Republic suffered numerous early defeats in the Rampjaar, due to an alliance of England, France, and several German states which planned on invading the Dutch Republic. In the hysteria that followed, he and his older brother Cornelis de Witt were blamed and lynched in The Hague, with their corpses at least partially eaten by the rioters. These cannibals were never prosecuted, and some historians claim William of Orange may have incited them.

Family and early life

Johan de Witt was a member of the old Dutch De Witt family. His father was Jacob de Witt, an influential regent from the patrician class in the city of Dordrecht, which in the 17th century was one of the most important cities of the dominating province of Holland. De Witt's mother was Anna van den Corput (1599–1645), niece of Johannes Corputius, an influential Dutch military leader and cartographer. Johan's brother Cornelis had a steep career in the shadow of the former. His uncle Andries de Witt held the position of Grand Pensionary of Holland between 1619 and 1621. Through the marriage of one of his other uncles to Margaretha of Nassau, daughter of Anna Johanna of Nassau-Siegen, De Witt was a distant relative of William of Orange-Nassau. Another relationship connected him to the Tromps, Maarten and his son Cornelis Tromp, both admirals of the Netherlands. Johan and his older brother Cornelis grew up in a privileged environment in terms of education, his father having as good acquaintances important scholars and scientists, such as Isaac Beeckman, Jacob Cats, Gerardus Vossius, and Andreas Colvius. Johan and Cornelis both attended the Latin school in Dordrecht, which imbued them with the values of the Roman Republic. After attending the Latin school in Dordrecht, Johan de Witt studied at the Leiden University, where he excelled at mathematics and law. He received his doctorate from the University of Angers in 1645. He practised law in The Hague as an associate with the firm of Frans van Schooten.

Marriage and children

In 1655 Johan de Witt married Wendela Bicker, daughter of Johan Bicker and Agneta de Graeff van Polsbroek, who belonged to the inner circle of the powerful Amsterdam oligarchy. Through his marriage, De Witt became a relative of the ruling patrician families Bicker, De Graeff, Hooft, Witsen, Boelens Loen, and Reynst among others. His brothers-in-law also included Amsterdam patrician Pieter de Graeff (who was also his full cousin), high official Gerard Bicker (I) van Swieten, arms dealer Jacob Trip and banker and financier Jean Deutz, all important and loyal political allies of De Witt. Frans Banninck Cocq (captain of Rembrandt's famous painting The Night Watch) became his uncle-in-law and Joachim Irgens von Westervick (between 1666 and 1675 owner of the private Irgens Estate, which was a huge part of Northern Norway) his cousin-in-law as well. Johan and Wendela had four children, three daughters and one son:

Anna de Witt (1655–1725), married to Herman van den Honert Agnes de Witt (1658–1688), married to Simon Teresteyn van Halewijn Maria de Witt (1660–1689), married to Willem Hooft Johan de Witt Jr. (1662–1701), secretary of the city of Dordrecht; married to Wilhelmina de Witt, the daughter of his uncle Cornelis de Witt After De Witt's death, Pieter de Graeff, husband of his wife Wendela's younger sister Jacoba Bicker, became the guardian of his children.

Politics In 1650 (the year that stadtholder William II, Prince of Orange died) he was appointed leader of the deputation of Dordrecht to the States of Holland and West Friesland. In December 1650, De Witt became the pensionary of Dordrecht as the successor of Nicolaas Ruys. In 1652, at the age of 27, De Witt was faced with a mob of angry demonstrators of sailors and fishermen in the city of Vlissingen. He held this position until July 1653 and was succeeded by Govert van Slingelandt, a distant relative of his.

Elected Grand Pensionary

In July 1653, the States of Holland elected De Witt Grand Pensionary. In making the appointment, De Witt relied on the express consent of Amsterdam headed by burgomaster and regent Cornelis de Graeff. The States of Holland chose him with the express intercession of his later uncle De Graeff. Since Holland was the Republic's most powerful province, he was effectively the political leader of the United Provinces as a whole – , especially during periods when no stadholder had been elected by the States of most Provinces. The raadpensionaris of Holland was often referred to as the Grand Pensionary by foreigners as he represented the preponderant province in the Union of the Dutch Republic. He led the States of the province by his experience, tenure, familiarity with the issues, and use of the staff at his disposal. He was in no manner equivalent to a modern Prime Minister. Representing the province of Holland, De Witt tended to identify with the economic interests of shipping and trading in the United Provinces. These interests were largely concentrated in the province of Holland, and to a lesser degree in the province of Zeeland.

Political goals As leader of the state-oriented party, Johan de Witt pursued the interests of the Dutch patricians and merchants. He had his most important goals formulated in 1662 by his like-minded Pieter de la Court in the book The Interest of Holland. They were:

… excerpt ends here. Continue reading the full article.

Illustrations

Johan de Witt illustration
Johan de Witt: Family coat of arms[9]
Family coat of arms[9]
Johan de Witt: Wendela Bicker
Wendela Bicker
Johan de Witt: Overview of the personal family relationships of the Amsterdam oligarchy between the regent-dynasties Boelens Loen, De Graeff, Bicker (van Swieten), Witsen and Johan de Witt in the Dutch Golden Age
Overview of the personal family relationships of the Amsterdam oligarchy between the regent-dynasties Boelens Loen, De Graeff, Bicker (van Swieten), Witsen and Johan de Witt in the Dutch Golden Age
Johan de Witt: Portrait of Johan de Witt (after Jan de Baen)
Portrait of Johan de Witt (after Jan de Baen)

Worked examples

Example 1 — a first encounter with Johan de Witt

Start with the simplest possible case. Write down what Johan de Witt claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Johan de Witt before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Johan de Witt ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Johan de Witt

In research
Johan de Witt appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Johan de Witt in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Johan de Witt is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1625 births, 1672 deaths, 17th-century Dutch mathematicians, so understanding it makes those chapters shorter.
In everyday life
Look for Johan de Witt outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Johan de Witt in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Johan de Witt means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Johan de Witt out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Johan de Witt in simple terms?

Johan de Witt (24 September 1625 – 20 August 1672) was a Dutch statesman and mathematician who was a major political figure during the First Stadtholderless Period, when flourishing global trade in a period of rapid European colonial expansion made the Dutch a leading trading and seafaring power in…

Why does Johan de Witt matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Johan de Witt?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Johan de Witt.

Tags

  • 1625 births
  • 1672 deaths
  • 17th-century Dutch mathematicians
  • 17th-century Dutch politicians
  • Assassinated Dutch politicians
  • Cannibalised people
  • De Witt family
  • Deaths by firearm in the Netherlands
  • Dutch States Party politicians
  • Dutch members of the Dutch Reformed Church
  • Grand Pensionaries
  • Leiden University alumni

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