Mongolia is a country in Asia, bordered by Russia to the north and China to the south. It is quite a large country, with a population of just 3.3 million, which makes is the world’s most sparsely populated state. But that’s today — we all know of Genghis Khan and his Mongol Empire, which was formed in 12th century and became the largest contiguous land empire in world history, spanning from present-day Poland to Korea, and Siberia to the Gulf of Oman and Vietnam, and having a population of over 100 million people (about a quarter of Earth’s total population at the time).

Mongolia postcard

Mongolia stamp postmark