Either by invitation or by conquest the Viking, or Varangian, leader Rurik (Hrorekr) established himself in 862 CE in which area?
Novgorod Oleg's kinsman then established himself in Kiev.
Before the capital of Japan was established in present day Kyoto by the Heian Emperor Kanmu in 794 CE, where was the previous capital?
Which Roman Emperor in 482 CE promoted the Henotikon or "instrument of union", signed by all Eastern bishops of the Christian Church with the design of solving the monophysite controversy about Jesus Christ's "nature"?