Polotsk ( Polatsk , Belarusian : Ð Ð 3\/4 Ì Ð '' Ð Ñ Ð , , ) is a historical city in Belarus , located on the Dvina river . ( as Ð Ð 3\/4 Ð '' Ð 3\/4 Ñ Ð Ñ Ð Ñ , \/ poloteskÅ \/ ) , together with Murom and Beloozero .