MORE EVENTS ON THIS DAY

2011: Tunisian President Zine al-Abidine Ben Ali stepped down following mass protests against poverty, unemployment, and political repression; the uprising was known as the Jasmine Revolution. [Test your knowledge of plots and revolutions.]

2005: The Huygens entry probe landed on Saturn's largest moon, Titan; it marked the first time a spacecraft landed on a planetary surface in the outer solar system. [How much do you know about Saturn?]

1970: Diana Ross and the Supremes staged their final concert, as Ross subsequently embarked on a solo career. [Test your knowledge of musical groups.]

1941: American actress Faye Dunaway, who was known for her tense, absorbing performances, was born. [Take our quiz about women in classic cinema.]

1861: Mehmed VI, the last sultan of the Ottoman Empire, was born. [How much do you know about the Ottoman Empire?]

1526: The Treaty of Madrid was signed by the Habsburg emperor Charles V (Charles I of Spain) and his prisoner Francis I, king of France, who had been captured during the Battle of Pavia in February 1525 and held prisoner until the conclusion of the treaty, when he was allowed to return to France. [Test your knowledge of kings and emperors.]