Piet van Wijngaerdt (1873–1964) was a prominent Dutch painter, printmaker, and lithographer, and is regarded as one of the most important founders of the Bergen School. This group of artists, originating in Bergen, North Holland, was known for its expressionist approach to landscape and figure, characterized by dark color tones, powerful brushwork, and a certain monumentality.

Van Wijngaerdt played a central role in the development and shaping of this movement. His work balances between figuration and abstraction and shows influences from French Cubism and Expressionism, which he managed to translate into his own, more restrained and earthy visual language. He primarily painted landscapes, village scenes, and still lifes, often constructed from solid forms and muted colors, in which structure and composition play an important role.

In addition to his painting, Van Wijngaerdt was active as a printmaker and lithographer, disciplines in which his sense of line and plane is also strongly evident. His work was widely exhibited and contributed significantly to the recognition of the Bergen School as one of the most influential art movements in the Netherlands in the early 20th century.

With his innovative vision and leading position within the Bergen School, Piet van Wijngaerdt has left a lasting mark on Dutch modern art.