How does power pass from ruler to ruler in the Russian empire?

In the Russian Empire, power typically passed from ruler to ruler through hereditary succession, often within the same royal family, primarily the Romanovs. However, this succession was occasionally marked by political intrigue, coups, or the influence of powerful nobles and the military. The ruling monarch could also be overthrown or replaced through revolutions, as seen in the 1917 Bolshevik Revolution, which ended centuries of imperial rule. Additionally, the Tsar's legitimacy was often reinforced by religious endorsement from the Orthodox Church.