The Cathedral of the Diocese of Polotsk. It is located in the very center of the city in a picturesque place, with a wonderful view of the Western Dvina River. The cathedral was built in 1761-1777 in the Baroque style. In Soviet times, the cathedral was closed and converted into a sports hall. It was reopened in 1991.
The cathedral is in a good (very good for me) place. Episcopal services are often held. The priest in the cathedral sings beautifully (without exaggeration). Even non-believers or weak parishioners (well, like me, for example), entering the cathedral, will stay there for more than 5 minutes. It is a pity that there are not as many ancient icons as we would like. Basically everything is new.
To be in Polotsk and not visit the cathedral? I can't afford it. There is a church shop on the territory, a place where you can collect holy water. Be sure to visit the service. They sing very well there. It is obligatory to listen to the ringing of the bells. But most of them go to worship the relics of Euphrosyne of Polotsk.