Jacob Baal-Teshuva, born 1929, is author, critic and independent curator of museum shows. He studied at the Hebrew University in Jerusalem and New York University. His numerous publications include works on Marc Chagall, Alexander Calder, Jean-Michel Basquiat, Andy Warhol, and Christo and Jeanne-Claude. Jacob Baal-Teshuva lives and works in New York and Paris. 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.