thumb|200px|Portrait of Jan Vermeyen by [[Johannes Wierix]]
Jan Cornelisz. Vermeyen, also known as Juan del Mayo (c. 1503 – 1559) was a Dutch painter, printmaker and tapestry designer. He is known for his portraits, history scenes and genre subjects. He worked in Mechelen and elsewhere, chiefly as a portraitist for the governors of the Habsburg Netherlands, Archduchess Margaret of Austria and Mary of Hungary. He also served the Emperor Charles V whom he accompanied on his military campaign to Tunis of 1535.
Life
His epitath in the church where he was buried stated that he was born in Beverwijk, which is a village about 10 kilometres north of Haarlem (now in the Netherlands). In his will made on 24 September 1559 (rediscovered only in 1998), he declared that he was at the time 55 years old. This means he was born around 1503.
thumb|250px|Portrait of Erard de la Marck
Around 1525 Vermeyen became court painter to Archduchess Margaret of Austria, who was governor of the Habsburg Netherlands and an aunt of Holy Roman Emperor Charles V. Her court was based in Mechelen. In 1529 he was paid an annual stipend of 100 Flemish pounds for these services. He travelled with the Archduchess to Augsburg and Innsbruck from 25 May to 27 October 1530. The Archduchess died in December 1530. Three years later, he claimed from her estate reimbursement for the materials used for 19 portraits which he had painted for the Archduchess. Between 1530 and 1533 he produced some works for Margaret’s successor, Mary of Hungary, the sister of Charles V, but he was probably not in her regular employ. Ten cartoons for the tapestries are in the collection of the Kunsthistorisches Museum in Vienna. The tapestries were woven between 1551 and 1553 in the Brussels workshop of Willem Pannemaker. In 1536 and 1538 the council of Brabant, the highest law court in the historic Duchy of Brabant, granted him the exclusive rights to publish prints of the Tunis campaign.