Kiev, Ukraine Factoid
In the 9th century, Kyiv was the largest town in Europe. It was said to be fifty times the size of London and 10 times that of Paris. Kyiv reached its pinnacle under the rule of Yaroslav the Wise, who was connected to the royal houses of France, Norway, Germany, England, Hungary, and Poland through the marriages of his children and grandchildren. Yaroslav is credited with building St. Sophia Cathedral.