The Metropolitan Museum of Art's Heilbrunn Timeline of Art History is funded by the Heilbrunn Foundation, New Tamarind Foundation, and Zodiac Fund. The Timeline of Art History presents the Met’s collection via a chronological, geographical, and thematic exploration of global art history. Targeted at students and scholars of art history, it is an invaluable reference, research, and teaching tool.
Authored by the Met’s experts — predominantly made up of curators but also of conservators, scientists, and educators — the Timeline comprises 300 timelines, 930 essays, close to 7,000 objects, and a robust index, and is regularly updated and enriched to provide new scholarship and insights on the collection.
From: http://www.metmuseum.org/toah/about
