Thank you, I'm looking for the one used during the post-Napoleonic era. So I guess it's All Russia then?
It is a little bit complicated but probably "All Russia" would do.
"Император и Самодержец Всероссийский, Московский, Киевский, Владимирский, Новгородский, Царь Казанский. Царь Астраханский, Царь Польский, Царь Сибирский, Царь Херсониса Таврического, Царь Грузинский, Великий Князь Финляндский и прочая, и прочая, и прочая."
"Emperor and Autocrat of All Russia, Moscow, Kiev, Vladimir, Novgorod, Tsar of Kazan, Tsar of Astrakhan, Tsar of Poland," etc.
One would assume that "All Russia" should include Moscow, Kiev, Vladimir and Novgorod but they are seemingly leftovers from the old times "Great Prince of Moscow, Vladimir", etc. or from the first Romanov monarchs "Autocrat of Moscow, Vladimir", etc.