Heilbrunn Timeline of Art HistoryThe Metropolitan Museum of Art's Heilbrunn Timeline of Art History presents the Met’s collection via a chronological, geographical, and thematic exploration of global art history. 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.