The Church of Isokyria (Isokyrian: ᚲᛁᚱᚲᚨᚾ ᛟᚠ ᛁᛇᛟᚲᛁᚱ, Kirkan of Isokir) is the state church of, and largest Christian denomination in, Isokyria. It was established in 1606 by Russian explorers as a branch of the Russian Orthodox Church. This remained the case until 1923 after the Isokyrian War of Independence when the church separated from the Eastern Orthodoxy. Between 1923 and 1938, it was non-denominational, loosely adhering to Catholic, Anglican, and Lutheran doctrines. After the Nororist victory in the Isokyrian Civil War, Christian Robertsson reformed the church, making it officially a Lutheran church as well as the state church of Isokyria.