https://theworldthroughtime.com/knowledge/ Explainers on history, geopolitics and geography, written alongside an interactive historical atlas. en https://theworldthroughtime.com/knowledge/olga-of-kiev https://theworldthroughtime.com/knowledge/olga-of-kiev Mon, 28 Sep 2026 09:00:00 GMT Empires & Dynasties Olga of Kiev buried envoys alive and burned a city with birds, then became a saint. Here is what really happened and what the sources say. https://theworldthroughtime.com/knowledge/volga-bulgaria https://theworldthroughtime.com/knowledge/volga-bulgaria Sun, 27 Sep 2026 09:00:00 GMT Empires & Dynasties Volga Bulgaria was a Muslim Turkic kingdom on the Volga and Kama that grew rich on furs and silver. Discover its story, from AD 922 to the Mongols.