Modern art has come to be defined by its styles, schools and movements. The more than three hundred collected here provide an indispensable introduction to the major developments in Western painting, sculpture, architecture and design during one of the most dynamic and exciting periods in art history. Over one hundred main entries are presented in broadly chronological order, from Impressionism and Cubism to Sound Art, Internet Art and Art Photography in the twenty-first century. A further two hundred supplementary entries provide fully cross-referenced summaries of essential styles and movements, tracing intriguing patterns of influence and development. A foldout timeline shows at a glance how the evolution of art corresponds with historical events, providing a thorough overview of the whole period. Listings of major international collections and carefully selected suggestions for further reading are given for all the main entries, and the comprehensive index features over one thousand artists, architects, designers, impresarios, critics, collectors and champions of modern art, linking the styles, schools and movements with the people who made them happen.