1550s in Russia

war in the Baltic region (1558-1583)

part of the Russo-Swedish Wars

1552 Russian conquest of Kazan

1439–1552 wars between Kazan and Russia

1557 peace treaty ending the Russo-Swedish War

Russian legal code

war between the Tsardom of Russia and Kazans

1551 Orthodox church council in Moscow

thumb|200px|One of the manuscripts containing One Hundred Chapters The Book of One Hundred Chapters, also called Stoglav () in Russian ("Hundred chapters"), is a collection of decisions of the Russian church council of 1551 that regulated the canon law and ecclesiastical life in the Tsardom of Russia, especially the everyday life of the Russian clergy.

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