Pierre Jeanneret (22 March 1896 – 4 December 1967) was a Swiss architect who collaborated with his cousin, Charles Edouard Jeanneret (who assumed the pseudonym Le Corbusier), for about twenty years.
Arnold Andre Pierre Jeanneret-Gris was born in Geneva. He grew up in the typical Jura landscape that influenced his early childhood and his Geneva Calvinism roots. He attended the School of Fine Arts (Ecole des Beaux-Arts, Geneva). As a young student, he was a brilliant painter, artist and architect, greatly influenced by Charles Edouard Jeanneret (Le Corbusier), his cousin and mentor for life. He was a cyclist in the Swiss Army from 1916 to 1918.