It is the largest Orthodox cathedral in the Baltic provinces built with the blessing of the Russian Tsar Alexander II  on the initiative of local governor-general Pyotr Bagration  and bishop Veniamin Karelin.
This is a description of the largest Orthodox cathedral in the Baltic region, built with the blessing of Tsar Alexander II, thanks to the efforts of Governor-General Pyotr Bagration and Bishop Veniamin Karelin.