On July 11, 969 Olga of Kiev, Regent and ruler of Kievan Rus, died at about age 79. From the article:
"Oleg Veshchy initiated Olga’s marriage with Prince Igor, who was the son of the Novgorod Prince Rurik, a founder of the Rurik Dynasty of Russian tsars. After the death of Oleg in 912, Igor became the ruler of Kievan Rus. In 945 Prince Igor went to the Slavic tribe of the Drevlyans to gather tributes. After he demanded a much higher payment, the Drevlyans killed him.
The death of the Kievan Prince raised a question about the next ruler of the country. Igor’s son, Svyatoslav, was only three years old, and hence Olga took the power into her hands. Interestingly, she had the full support the Rus army, which attests to the great respect she held among the people.
After killing Igor, the Drevlyans sent their matchmakers to propose that Olga marry their Prince Mal. The Princess took revenge upon her husband’s death, killing all of the ambassadors.
The Old Russian annals describe four types of vengeance organized by Olga. First, she ordered the capture of the 20 matchmakers who had come to Kiev and had them buried alive. The Princess then asked the Drevlyans to send better ambassadors to her, but as soon as they arrived, they were burned in a bathhouse. Soon after that Olga went to the land of the Drevlyans, supposedly to have a funeral feast in memory of her murdered husband. Having made her enemies drunk during the feast, the governess then ordered them all killed. The annals report about five thousand victims in this third act of revenge.
The last vengeance took place in the year 946 when Olga traveled around the land of the Drevlyans in order to gather tributes. She besieged the town of Iskorosten, which refused to pay her. According to legend, the Princess asked that each household present her with a dove as a gift. Then she tied burning papers to the legs of the doves and let them fly back to their homes. As a result, the entire town was destroyed by fire."