13th » Hungarian Revolution of 1848 e.g Hungary becomes a republic.
14th » Hungary Hungarian Declaration of Independence known as declares itself independent of Austrian Empire called Austria with Lajos Kossuth as its leader.
Famous Birthdays on April in 1849
17th » William R. Day, American jurist and politician, 36th United States Secretary of State (d. 1923)
25th » Felix Klein, German mathematician (d. 1925)