Pieter Aertsen (Amsterdam, 1508 – 3 June 1575), called Lange Pier ("Tall Pete") because of his height, was a Dutch painter in the style of Northern Mannerism. He is credited with the invention of the monumental genre scene, which combines still life and genre painting and often also includes a biblical scene in the background. He was active in his native city Amsterdam but also worked for a long period in Antwerp, then the centre of artistic life in the Netherlands.
His genre scenes were influential on later Flemish Baroque painting, Dutch still life painting and also in Italy. His peasant scenes preceded by a few years the much better-known paintings produced in Antwerp by Pieter Bruegel the Elder.
He was apprenticed with Allaert Claesz. He then travelled to the Southern Netherlands and took up residence in Antwerp, first with his compatriot Jan Mandijn. Aertsen became a member of Antwerp's Guild of Saint Luke. In the official books of the Guild he is recorded as "Langhe Peter, schilder" (Tall Peter, painter). In 1542 he became a citizen (poorter) of Antwerp. He also got married to Kathelijne Beuckelaar, the daughter and sister of an Antwerp painter and aunt of Joachim Beuckelaer and Huybrecht Beuckeleer. Of the couple's eight children, three sons, Pieter, Aert, and Dirk became successful painters.
Aertsen returned to Amsterdam in 1555-56. Notable pupils who trained in his workshop included Stradanus and Aertsen's nephews, Joachim Beuckelaer and Huybrecht Beuckeleer. Joachim Beuckelaer continued and further developed Aertsen's style and subject matter of painting.