DGA3934123: Carved back of Regency-style carved mahogany armchair, 1810-1820, United Kingdom, 19th century, Detail / Bridgeman Images

DGA3934128: Riviere necklace with citrine quartz embedded in gold filigree, 1830, 19th century / Bridgeman Images

DGA3934130: Diamond circle necklace, that forms two bracelets, about 1820, 19th century / Bridgeman Images

DGA3934135: Diamond necklace; Aigrette, feather-shaped hair jewel, with cushion-cut diamonds, 19th century / Bridgeman Images

DGA3934143: Gold brooch with archaeological style Roman mosaic, about 1860, Castellani manufacture, Italy, 19th century / Bridgeman Images

DGA3934151: Earrings and brooches, 1860-1870, by Carlo Giuliano (1831-1895), Italy, 19th century / Bridgeman Images

BYF3868114: Portrait of John Cage, 1981 (photo) / Bridgeman Images

BYF3868094: Philip Glass playing, 1977 (photo) / Bridgeman Images

BYF3835712: Oliver Knussen, 1989 (photo) / Bridgeman Images

BYF3835737: Anders Hillborg, 2006 (photo) / Bridgeman Images

BYF3835745: Anders Hillborg, 2006 (photo) / Bridgeman Images

BYF3835755: Gerald Barry & Merce Cunningham, 2007 (photo) / Bridgeman Images

BYF3835756: Gerald Barry, 2007 (photo) / Bridgeman Images

BYF3835763: Hanspeter Kyburz & Merce Cunningham, 2006 (photo) / Bridgeman Images

BYF3835776: Thomas Adès, 2007 (photo) / Bridgeman Images

BYF3837784: Jacob Druckman, 1990 (photo) / Bridgeman Images

BYF3839790: Mauricio Kagel, 1988 (photo) / Bridgeman Images

BYF3839796: Peter Sellars, 1988 (photo) / Bridgeman Images

BYF3839802: Portrait of Paul Dresher, 1984 (photo) / Bridgeman Images

BYF3844145: Wolfgang Rihm receiving word, 1997 (photo) / Bridgeman Images

BYF3844149: Lou Harrison with Keith Jarrett, 1985 (photo) / Bridgeman Images

BYF3844153: Lou Harrison with Keith Jarrett, 1985 (photo) / Bridgeman Images

BYF3844173: Peter Sellars, 1995 (photo) / Bridgeman Images

BYF3844176: Luciano Berio, 1994 (photo) / Bridgeman Images

BYF3844257: Portrait of John Cage, 1981 (photo) / Bridgeman Images

BYF3844263: Portrait of John Cage, 1991 (photo) / Bridgeman Images

BYF3844270: John Cage, 1978 (photo) / Bridgeman Images

BYF3844303: Helmut Lachenmann, Chicago, 1997 (photo) / Bridgeman Images

BYF3844306: Helmut Lachenmann, Chicago, 1997 (photo) / Bridgeman Images

BYF3844313: Helmut Lachenmann playing, 1997 (photo) / Bridgeman Images

BYF3844315: Helmut Lachenmann, Chicago, 1997 (photo) / Bridgeman Images

BYF3844932: Louis Andriessen composing, 1988 (photo) / Bridgeman Images

BYF3844934: Magnus Lindberg conducting, 1998 (photo) / Bridgeman Images

BYF3846974: Morton Subotnik, Santa Fe, 1988 (photo) / Bridgeman Images

BYF3848359: Earle Brown, 1998 (photo) / Bridgeman Images

BYF3848370: Earle Brown, 1998 (photo) / Bridgeman Images