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• n  the 400th anniversary (or the celebration of it)

• The lecture he gave at Harvard in 1947 on Don Quixote as part of a series commemorating the quatercentenary of the birth of Cervantes is still talked of, for he had consumed a few .
• The wars of the 20th Century have twice balked quatercentenary celebrations of Vesalius (born in 1514) and his book.

• quatercentennial