Peace of Augsburg
After the Peace of Augsburg in 1555, the principle that the religion of the ruler dictated the religion of the ruled ("cuius regio, eius religio") was observed throughout the Holy Roman Empire. Section 24 of the Peace of Augsburg ("ius emigrandi") guaranteed members of denominations other than the ruler's the freedom of emigration with all their possessions. Political stalemates among the government members of different denominations within a number of the republican free imperial cities such as Augsburg, the Free City of Frankfurt, and Regensburg, made their territories de facto bi-denominational, but the two denominations did not usually have equal legal status.