During these many centuries of war and changes of power in the Baltic, and despite demographic changes, the Baltic Germans in Riga had maintained a dominant position. By 1867, Riga's population was 42.9% German. Riga employed German as its official language of administration until the installation of Russian in 1891 as the official language in the Baltic provinces, as part of the policy of Russification of the non-Russian speaking territories of the Russian Empire, including Congress Poland, Finland and the Baltics, undertaken by Tsar Alexander III. More and more Latvians started moving to the city during the mid-19th century. The rise of a Latvian bourgeoisie made Riga a centre of the Latvian National Awakening with the founding of the Riga Latvian Association in 1868 and the organisation of the first national song festival in 1873. The nationalist movement of the Neo-Latvians was followed by the socialist New Current during the city's rapid industrialisation, culminating in the 1905 Revolution led by the Latvian Social Democratic Workers' Party.