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Mary I of England reigned as queen from 1553 to 1558. The eldest daughter of Henry VIII of England (r. 1509-1547) with Catherine of Aragon (1485-1536), she restored Catholicism in England while her persecution of Protestants...

Eratosthenes (l. c. 276-195 BCE) was a Greek astronomer, geographer, mathematician, and poet best known for being the first to calculate the circumference of the earth and its axial tilt. He is also recognized for his mathematical...

Alfred the Great (r. 871-899) was the king of Wessex in Britain but came to be known as King of the Anglo-Saxons after his military victories over Viking adversaries and later successful negotiations with them. He is the best-known...

The lyre was a stringed musical instrument played by the ancient Greeks. It was probably the most important and well-known instrument in the Greek world. The lyre was closely related to the other stringed instruments: the chelys which...

The Hitler Youth (Hitlerjugend or HJ), named after the leader of the German Nazi Party Adolf Hitler (1889-1945), was designed to indoctrinate 14-18 year-old boys into the party's way of thinking. Its activities promoted physical...

L. Mestrius Plutarchus, better known simply as Plutarch, was a Greek writer and philosopher who lived between c. 45-50 CE and c. 120-125 CE. A prodigious and hugely influential writer, he is now most famous for his biographical works...

Søren Kierkegaard (1813-1855) was a Danish philosopher and is considered to be the first existentialist, influencing such notable philosophers as Jean-Paul Sartre (1905-1980) and Martin Heidegger (1889-1976). His works are a...

Mahmud II was one of the most influential sultans of the Ottoman Empire. As a radical reformer, he strove to implement military and governmental reforms to prevent the empire from collapsing. His removal...

Cynisca of Sparta (b. c. 440 BCE) was a Spartan royal princess who became the first female Olympic champion. Defying the traditional role of women in ancient Greece, she competed in the Olympic Games alongside the men and won...

Cleopatra of Macedon (355/4-308 BCE), daughter of Philip II of Macedon (reign 359-336 BCE) and his Molossian queen, Olympias of Epirus (c. 375-316 BCE), was the only full sister of Alexander the Great (reign 336-323 BCE...