Willem Thibaut, Tybaut, or Tibout (1524–1597), was a Dutch Golden Age

Dutch Golden Age

The Golden Age was a period in Dutch history, roughly spanning the 17th century, in which Dutch trade, science, military and art were among the most acclaimed in the world. The first half is characterised by the Eighty Years' War till 1648...

 painter.

Biography

According to the RKD he lived and worked in Haarlem, but made the cartoons for the two stained-glass windows in the Janskerk (Gouda)

Janskerk (Gouda)

The Sint Janskerk in Gouda, the Netherlands, is a large Gothic church, known especially for its stained glass windows, for which it has been placed on the UNESCO list of Dutch monuments.-History:...

 in 1570.

According to Arnold Houbraken

Arnold Houbraken

Arnold Houbraken was a Dutch painter and writer from Dordrecht, now remembered mainly as a biographer of artists from the Dutch Golden Age. He had ten children. His son Jacobus Houbraken was an engraver of portraits and book illustrations, including books by his father...

, who never understood why Karel van Mander never included glass painters in his Schilderboeck, Thibaut was famous enough to be mentioned in Samuel Ampzing

Samuel Ampzing

Samuel Ampzing was a Dutch minister, poet and purist.-Biography:Born to the minister Johannes Ampzing in Haarlem, in 1616 Samuel became a minister himself at Rijsoord in Strevelshoek, and in 1619 at the Sint-Bavokerk in Haarlem.-Beschrijvinge ende lof der stad Haerlem in Holland:In 1617, he began...

's praise of Haarlem with the words How masterly he could write on glass!.

Thibaut was also the inventor of the Counts of Holland print series that was later reprinted by Philip Galle and Michiel Vosmeer (1578–1616) in 1578 in Antwerp. This series of prints was published to accompany a reprint of Melis Stoke

Melis Stoke

Melis Stoke was a Dutch writer who lived in the 13th century.-Biography:Melis Stoke was probably born in the Dutch province of Zeeland around 1235...

's Hollandse Jaar-Boeken of Rijm-Kronijk in 1699 by Cornelis van Alkemade. The addendum to the title; Met de Afbeeldingen van alle de HOLLANDSE GRAVEN, Geschetst naar de aaloude schilderijen der Karmeliten te Haarlem meant that the prints were used based on the frescoes found after the Siege of Haarlem

Siege of Haarlem

The siege of Haarlem was an episode of the Eighty Years' War. From December 11, 1572 to July 13, 1573 an army of Philip II of Spain laid bloody siege to the city of Haarlem in the Netherlands, whose loyalties had begun wavering during the previous summer...

 in the Carmelite monastery in Haarlem. These frescoes were copied by Thibaut and used to make a stained glass series in Leiden that are now in the possession of the Stedelijk Museum De Lakenhal

Stedelijk Museum De Lakenhal

Stedelijk Museum De Lakenhal is a city museum of fine arts in Leiden, the Netherlands. The museum hosts a collection of altarpieces and religious artifacts from before the Protestant Revolution that were formally ceded to the state in 1572, but it is mainly of interest for its collection of...

. The frescoes were uncovered after the paintings hanging over them with the same subjects were removed to the Haarlem city hall.

According to Dirck Volckertszoon Coornhert

Dirck Volckertszoon Coornhert

Dirck Volckertszoon Coornhert was a Dutch writer, philosopher, translator, politician and theologian. Coornhert is often considered the Father of Dutch Renaissance scholarship.-Biography:...

's biographer, Thibaut was friends with Maarten van Heemskerck, and designed prints for Coornhert. These engravings were produced in 1556-1557 and published by Hieronymus Cock

Hieronymus Cock

Jérôme or Hieronymus Cock, or Wellens de Cock was a Flemish painter and etcher of the Northern Renaissance, as well as a publisher and distributor of prints.-Biography:...

, and all had to do with the foolishness of man.