Justin II was the Eastern Roman emperor who ruled from 565 until 578. The nephew of Justinian I, he ascended to the throne following his uncle's death and was crowned by the Patriarch of Constantinople. His reign, which began with efforts to settle imperial debts and reform marriage laws, eventually faced significant challenges due to a more aggressive foreign policy. This shift led to renewed conflicts with the Sassanid Empire and wars with the Lombards. In his later years, the emperor's rule was characterized by severe mental illness.