the czar
they are orthodox christians.
isolated from Europe
No that's Constantine
Most historians of this era agree Christianity was established as the official religion of Rome by the Roman Emperor Constantine in 313 AD.
There is no leader of the Judaism religion.
Islam is the official religion in Afghanistan.
There is no 'official' religion in the USA
Theres no official religion in Tanzania. The government do not have religion, the citizen do have.
During the cold war (prior to 1991); the USSR-Union of Soviet Socialist Republics.
There is no official religion anywhere in the United States.
There is no Official religion in Puerto Rico.
It had no official religion except for trinitarian Christianity.