The Slavic congress in Prague begins.

The Prague Slavic Congress of 1848 (Czech: Slovanský sjezd, Slovak: Slovanský zjazd/kongres) took place in Prague between 2 June and 12 June 1848. It was the first occasion on which voices from nearly all Slav populations of Europe were heard in one place.Several other Slavic Congresses were held in different central and eastern European cities over the next century.