Jesse Owens won the first of his four gold medals at the Berlin Olympic Games on this day in 1936. / La Scala opera house was inaugurated on this day in 1778.

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Hitler united both the chancellorship and presidency of Germany on this day in 1934. / On this day in 1874, scientist and women's rights activist Berta Lutz was born.

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Caroline Herschel became the first woman to discover a comet on this day in 1786. / On this day in 1911, cartoonist Jackie Ormes was born.

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Ferdinand and Isabella issued the Alhambra Decree on this day in 1492. / On this day, Germany targeted the Soviets' 588th Night Bomber Regiment, aka the Night Witches, with tracers and deployed night fighters.

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The Diggers' Republic of Klipdrift was founded in South Africa on this day in 1870. / On this day in 1511, artist, architect, and writer Giorgio Vasari was born.

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Confederate spy Belle Boyd was arrested in this day in 1862. / On this day in 1836, the Arc de Triomphe in Paris was inaugurated.

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Peru declared independence from Spain on this day in 1821. / On this day in 1866, children's author Beatrix Potter was born.

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Korean Armistice Signed - July 27, 1953 / On this day in 1794, members of the National Convention arrested Maximilien Robespierre and some of his supporters, in what became known as the Thermidorian Reaction.

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Liberia Declared Independence - July 26, 1847 / On this day in 1887, "Unua Libro," the first book to describe the international language of Esperanto, was published in Warsaw.

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The U.S. invaded Puerto Rico on this day in 1898, during the Spanish-American War. / On this day in 1978, Louise Joy Brown became the first person to be born through in vitro fertilization.

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