Laurens Janszoon Coster

Laurens Janszoon Coster (c. 1370, Haarlem, the Netherlands – c. 1440), or Laurens Jansz Koster, is the name of a purported inventor of a printing press from Haarlem. He allegedly invented printing simultaneously with Johannes Gutenberg and is regarded by some in the Netherlands as having invented printing first.

He was an important citizen of Haarlem and held the position of sexton (Koster) of Sint-Bavokerk. He is mentioned in contemporary documents as an assessor (scabinus), and as the city treasurer. He probably perished in the plague that visited Haarlem in 1439-1440; his widow is mentioned in the latter year.

There are no known works printed by Laurens.

Hadrianus Junius, otherwise known as Adriaen de Jonghe, wrote this story around 1567 in his book Batavia, published only in 1588, and was quoted by Cornelis de Bie. Now known primarily for his Emblemata, Junius moved to Haarlem in 1550, and wrote several books, acting shortly as the rector of the Latin School there, as the city physician and as historiographer of the States of Holland (as of 1565/66). His story was echoed by his friend Dirck Volckertszoon Coornhert, who started a printing business in Haarlem in 1560. Later Samuel Ampzing (with the help of Petrus Scriverius) repeated the story in Lavre-Kranz Voor Lavrens Koster Van Haerlem, Eerste Vinder vande Boek-Druckerye (1628) with illustrations of the invention. According to Junius, sometime in the 1420s, Coster was in the Haarlemmerhout carving letters from bark for the amusement of his grandchildren, and observed that the letters left impressions on the sand. He proceeded to invent a new type of ink that didn't run, and he began a printing company based on his invention with a primitive typesetting arrangement using moveable type. Since the Haarlemmerhout was burned during a siege by the Kennemers in 1426 during the Hook and Cod wars, this must have been early in the 1420s. Using wooden letters at first, he later used lead and tin movable type. His company prospered and grew. He is said to have printed several books including Speculum Humanae Salvationis with several assistants including the letter cutter Johann Fust, and it was this letter cutter Fust (often spelled Faust) who, when Laurens was nearing death, broke his promise of secrecy and stole his presses and type and took them to Mainz where he started his own printing company.

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