Guilliam du Gardijn 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...

 landscape painter.

Biography

According to the RKD he was the teacher of Johann Heinrich Roos

Johann Heinrich Roos

Johann Heinrich Roos was a German Baroque era landscape painter and etcher.-Biography:...

 who lived with him in his Amsterdam atelier in 1647. He probably knew the Roos family as part of a German expat community in Amsterdam that had fled the Thirty Years War. He painted Italianate landscapes with ruins, some of which are biblical scenes, and some of which have trees that appear human. A few of these are in the possession of the Stedelijk Museum Alkmaar

Stedelijk Museum Alkmaar

Stedelijk Museum Alkmaar is a city museum located in the center of Alkmaar on the Canadaplein . The museum is devoted to presenting and preserving the cultural history of Alkmaar and the surrounding region.-History:...

, and one is in the Rijksmuseum

Rijksmuseum

The Rijksmuseum Amsterdam or simply Rijksmuseum is a Dutch national museum in Amsterdam, located on the Museumplein. The museum is dedicated to arts, crafts, and history. It has a large collection of paintings from the Dutch Golden Age and a substantial collection of Asian art...

 in Amsterdam. He also made a series of drawings of Turkish figures after Pieter van Aelst

Pieter van Aelst

Pieter van Aelst or Pieter Coecke van Aelst was a Flemish painter. He studied under Bernaert van Orley and later lived in Italy before entering the Antwerp Guild of painters in 1527. In 1533, he travelled to Constantinople for one year in a failed attempt to establish business connections for...

.