Events of lasting impact or importance occurring in the 20th century.

Time period from 1901 through 2000 of the common era.

Synonyms: Cent. Histories, 20th (Medicine), 20th Cent. History (Medicine), Medical History, 20th Cent., Twentieth Century History, Histories, 20th Cent. (Medicine), 20th Cent. Medicine, History, 20th Century, Histories, 20th Century, Century History, Twentieth, 20th Century History, History, 20th Cent. (Medicine), Century History, 20th, Medicine, 20th Cent., Cent. History, 20th (Medicine), History of Medicine, 20th Cent., 20th Cent. History of Medicine, Historical Events, 20th Century, History, Twentieth Century, Histories, Twentieth Century, 20th Century Histories, Twentieth Century Histories, 20th Cent. Histories (Medicine), Century Histories, Twentieth, Century Histories, 20th