The Hungarian Constitution of 1949 was adopted on 20 August 1949[a] and heavily amended on 23 October 1989.[b] The document was Hungary's first permanent written constitution, and until its replacement in 2011, the country was the only former Eastern Bloc nation that did not adopt an entirely new constitution after the fall of Communism. The Constitution of Hungary, adopted in 2011, declares the 1949 constitution to be invalid.