April 20, 1657: Freedom of religion is granted to the Jews of New Amsterdam (later New York City).
April 21, 753 BC: The traditional date of the foundation of Rome by Romulus and Remus.
April 22, 1889: At noon, thousands rush to claim land in the Land Run of 1889. Within hours, the cities of Oklahoma City and Guthrie are formed with populations of at least 10,000.
April 23, 1815: The Second Serbian Uprising erupts after the annexation of the country to the Ottoman Empire.
April 24, 1800: The US Library of Congress is established when President John Adams signs legislation to appropriate $5,000 to purchase “such books as my be necessary for the use of Congress”.
April 25, 1792: La Marseillaise (the French national anthem) is composed by Claude Joseph Rouget de Lisle.
April 26, 1803: Thousands of meteor fragments fall from the sky over L’Aigle, France.