Christo and Jeanne-Claude, both born on June 13, 1935, have been working in collaboration since 1961, Previous large-scale projects include Wrapped Coast, Australia, 1968 - 69, Valley Curtain, Grand Hogback, Rifle, Colorado, 1970 - 72, Running Fence, Sonoma and Marin Counties, California, 1972 - 76, Surrounded Islands, Biscayne Bay, Greater Miami, 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. Wolfgang Volz has been working with Christo and Jeanne-Claude since 1971 and was project director (with Roland Specker) for Wrapped Reichstag and (with Josy Kraft) for Wrapped Trees and he was in charge of The Wall, 13,000 Oil Barrels, 1999. He is the exclusive photographer of Christo and Jeanne-Claude's works. This close collaboration has resulted in many books and more than 300 exhibitions in museums and galleries around the world. Wolfgang Volz and his wife and partner, Sylvia Volz, live and work in Dusseldorf, Germany. Jonathan William Henery is the son of Jeanne-Claude's sister, Joyce May Henery. In 1993, he received a Bachelor of Arts from Fordham University. He is a musician and has been Jeanne Claude's full-time assistant since 1996.