Brief Biography-Jan Mostaert of Haarlem may have been a pupil of Geertgen tot Sint Jans, and there is a strong influence of Geertgen in his work. However, old accounts state Jacob Janszen of Haarlem, as his true master. Margaret of Austria, who was Regent of the Netherlands, sister to Philip I, King of Spain, engaged him as her painter. She took him on her journeys, mainly as a portraitist for her subjects and nobility. She retained him in her service for eighteen years. Yet despite his travels, he maintained his Dutch style of painting. However, he did pictures of foreign lands which he could only have learned about through literature and illustrations. His landscape of the West Indies being his most noted one which is in the Frans Hals Museum, Haarlem. The Great Fire of Haarlem in 1576 consumed most of his paintings. He is also known as Master of Oultremont and sometimes confused with Waagen'sche Mostaert, who was Adriaen Isenbrant.