The parish of St. Theodosius was organized in Cleveland in 1896 by
Carpatho-Rusyn immigrants living in Tremont. They were originally
Ruthenian Greek Catholics (also known as Byzantine Catholics) who became dissatisfied by their affiliation with the
Catholic Church and followed Carpatho-Rusyn church leader
Alexis Toth into
Russian Orthodoxy. This same situation played out in many
Eastern Catholic parishes in the US, and the results formed the core group of the present Orthodox Church in America (OCA). The first church structure was a
light-frame construction building, at Literary Rd. and W. 6th St., built in 1896. The current cathedral is the parish's third church structure. The Provisional Government was overthrown by the
Bolsheviks in the
October Revolution of 1917. Shortly afterwards, the church elected
Tikhon of Moscow to be
Patriarch of Moscow and all Rus'. The subsequent violence of the Russian Civil War devastated the church and the country. The
Soviet government opposed the church, and many
White émigrés came to Cleveland and joined St. Theodosius during this period. Longtime pastor Fr. Jason Kappanadze of
Georgia was among them. On February 25–28, 1919, the cathedral hosted the Second All-American Sobor which set a precedent, by electing Alexander (Nemolovsky) to the rank of Archbishop of the Aleutians and North America, for future elections of the Church's primates by later councils. This made him the first primate to be chosen locally in North America. The Russian Orthodox Church was weakened again and further dissociated in 1922, when the
Living Church, a Soviet-supported movement, dismissed the Patriarch and restored a Synod to power. On November 20–23, 1934, the cathedral hosted the Fifth All-American Sobor which elected primate
Theophilus (Pashkovsky). On November 26–29, 1946, it hosted the Seventh All-American Sobor which broke ties between the Orthodox Church in America and
Russian Orthodox Church Outside Russia. It was rededicated on October 3, 1954. In the summer of 1977, St. Theodosius served as the site for the wedding scene in the film
The Deer Hunter. On June 16, 1961, it also appeared in an episode of the TV series
Route 66 ("Incident On a Bridge"). On May 28, 2024, the cathedral caught fire due to a roofing accident. As a result of the damage, the main dome was temporarily removed on June 1. The cathedral is currently in a process of restoration and repair. ==Architecture==