19th century political ideology concerned with the advancement of integrity and unity for the Slavic-speaking peoples

Pan-Slavism is a political idea. It originated in the 19th century. Pan-Slavism is an ideology that seeks to unify all Slavic countries into one nation.

The Pan-Slavic flag approved at the Prague Slavic Congress, 1848. It also used to be the Yugoslav flag from 1918 until 1945.