Christo and Jeanne-Claude began their collaboration in 1961, and lived in New York City since 1964. Jeanne-Claude died in 2009; Christo died in 2020. Their large-scale projects include Wrapped Coast, Australia, 1968-69; Valley Curtain, Rifle, Colorado, 1970-72; Running Fence, Sonoma and Marin Counties, California, 1972-76; Surrounded Islands, Biscayne Bay, Florida, 1980-83; The Pont Neuf Wrapped, Paris, 1975-85; The Umbrellas, Japan-USA, 1984-91; Wrapped Reichstag, Berlin, 1971-95; Wrapped Trees, Riehen, Switzerland, 1997-98; The Gates, Central Park, New York City, 1979-2005; The Floating Piers, Lake Iseo, Italy, 2014-16, The London Mastaba, Serpentine Lake, Hyde Park, 2016-18, and L'Arc de Triomphe, Wrapped, Paris, 1961-2021. Wolfgang Volz has worked with Christo and Jeanne-Claude as the exclusive photographer of their works since 1971. He was also project director (with Roland Specker) for Wrapped Reichstag, Berlin, 1971-95 and (with Josy Kraft) for Wrapped Trees, Riehen, Switzerland, 1997-98, and was in charge of The Wall - 13,000 Oil Barrels, Gasometer Oberhausen, Germany, 1998-99 and Big Air Package, Gasometer Oberhausen, Germany, 2010-13. His close collaboration has resulted in many books and more than 300 exhibitions in museums and galleries around the world.