Carl Nesjar (né Carlsen; 6 July 1920 – 23 May 2015) was a Norwegian painter, sculptor and graphic artist. He is best known for his collaborations with Pablo Picasso; serving for nearly twenty years as Picasso's chosen fabricator — the artist who turned Picasso's drawings and scale models into large public sculptures. One such work was Picasso's Regjeringskvartalet murals which are located in Oslo, the city where Nesjar lived for most of his life. He is also known for his series of "Ice Fountains” which can be found in cities around the world.