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Events on Saturday 22 June 1675 1
1675Royal Greenwich Observatory FoundedCharles II establishes England's national observatoryKing Charles II ordered the construction of an observatory at Greenwich to improve navigation and astronomy, appointing John Flamsteed as the first Astronomer Royal. The foundation stone was laid on 10 August 1675 under the direction of Christopher Wren. The observatory later gave its name to Greenwich Mean Time and the Prime Meridian.