The interwar period was one of great cultural advancement. Estonian language schools were established, and artistic life of all kinds flourished. One of the more notable cultural acts of the independence period, unique in western Europe at the time of its passage in 1925, was a guarantee of cultural autonomy to minority groups comprising at least 3,000 persons, including Jews (see history of the Jews in Estonia). Historians see the lack of any bloodshed after a nearly "700-year German rule" as indication that it must have been mild by comparison.