Catherine the Great becomes Empress of Russia following the coup against her husband, Peter III.

Catherine II, most commonly known as Catherine the Great, was the reigning empress of Russia from 1762 to 1796. She came to power after overthrowing her husband, Peter III. Under her long reign, inspired by the ideas of the Enlightenment, Russia experienced a renaissance of culture and sciences, which led to the founding of many new cities, universities, and theatres, along with large-scale immigration from the rest of Europe and the recognition of Russia as one of the great powers of Europe.

Peter III Fyodorovich was Emperor of Russia from 5 January 1762 until 9 July of the same year, when he was overthrown by his wife, Catherine II. He was born in the German city of Kiel as Charles Peter Ulrich of Schleswig-Holstein-Gottorp, the grandson of Peter the Great and great-grandson of Charles XI of Sweden.

July 9 is the 190th day of the year in the Gregorian calendar; 175 days remain until the end of the year.