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Sjaerdemaslot SjaerdemaslotFraneker2.jpg

Sjaerdemaslot was a Frisian castle, a so-called "state", in Franeker, the Netherlands. In 1446 the construction of the castle was started and the state was demolished in 1727. Famous residents include the philosopher René Descartes and Duke Albert of Saxony.

Friesland Province of the Netherlands

Friesland, also historically known as Frisia, is a province of the Netherlands located in the northern part of the country. It is situated west of Groningen, northwest of Drenthe and Overijssel, north of Flevoland, northeast of North Holland, and south of the Wadden Sea. In 2015, the province had a population of 646,092 and a total area of 5,100 km2 (2,000 sq mi).

A stins is a former stronghold or villa in the province of Friesland, the Netherlands. Many stinsen carry the name "state".

Franeker City in Friesland, Netherlands

Franeker is one of the eleven historical cities of Friesland and capital of the municipality of Waadhoeke. It is located north of the Van Harinxmakanaal and about 20 km west of Leeuwarden. As of 1 January 2014, it had 12,781 inhabitants. The Eise Eisinga Planetarium, established in 1781, is located in the city.


The structure

The moated castle was built into the main canal of the Frisian city Franeker and turned into a citadel. When the moat was completed, the state was only accessible by a bridge. It had two storeys above a basement. Besides the main building it had two wings and a large round tower. A smaller tower was on the west side of the final.

Moat dry or watery ditch surrounding a fortification or town

A moat is a deep, broad ditch, either dry or filled with water, that is dug and surrounds a castle, fortification, building or town, historically to provide it with a preliminary line of defence. In some places moats evolved into more extensive water defences, including natural or artificial lakes, dams and sluices. In older fortifications, such as hillforts, they are usually referred to simply as ditches, although the function is similar. In later periods, moats or water defences may be largely ornamental. They could also act as a sewer.

Citadel type of fortress protecting a town and naval term for a safe room

A citadel is the core fortified area of a town or city. It may be a castle, fortress, or fortified center. The term is a diminutive of "city" and thus means "little city", so called because it is a smaller part of the city of which it is the defensive core. Ancient Sparta had a citadel as did many other Greek cities and towns.

Bridge structure built to span physical obstacles

A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle, usually something that can be detrimental to cross otherwise. There are many different designs that each serve a particular purpose and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.


The first inhabitants were Douwe Aylva and Edwert Sjaerdema. Later it was ceded to duke Albert of Saxony. Eventually the family got the state back after Albert of Saxony had lived there for several years. Later the castle belonged to Carel van Sternsee who was married to Cammingha Luts. Then Ruurd van Juckema inherited the castle. In the summer of 1629 he rented it to French philosopher René Descartes. The latter came to Franeker because of the local university. The castle was passed from father to son and eventually to Eduarda Lucia Juckema who was married to Martena Duca. The grandson of this couple later sold the state in 1725, only to be demolished that same year. [1]

Albert of Saxony king of Saxony

Albert was a German King of Saxony and a member of the House of Wettin.

René Descartes 17th-century French philosopher, mathematician, and scientist

René Descartes was a French philosopher, mathematician, and scientist. A native of the Kingdom of France, he spent about 20 years (1629–49) of his life in the Dutch Republic after serving for a while in the Dutch States Army of Maurice of Nassau, Prince of Orange and the Stadtholder of the United Provinces. He is generally considered one of the most notable intellectual figures of the Dutch Golden Age.

University of Franeker university

The University of Franeker (1585–1811) was a university in Franeker, Friesland, the Netherlands. It was the second oldest university of the Netherlands, founded shortly after Leiden University.


International Standard Book Number Unique numeric book identifier

The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency.

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