March 13 has no owner yet

On March 13, 1781, German-British astronomer William Herschel discovered the planet Uranus from his garden in Bath, England, becoming the first modern astronomer to discover a planet with a telescope. Uranus was the first planet discovered in the modern era and expanded the known size of the solar system. Herschel also catalogued thousands of nebulae and star clusters.

On March 13, 1881, Tsar Alexander II of Russia was assassinated in St Petersburg by a bomb thrown by members of the terrorist organisation Narodnaya Volya ("The People's Will"). Paradoxically, Alexander II was the most reformist of Russia's tsars and had emancipated the serfs in 1861. His assassination halted the reform process and hardened the regime under his successor Alexander III.

On March 13, 2013, Argentine Cardinal Jorge Mario Bergoglio was elected pope by the conclave, taking the name Francis. He is the first Latin American pope in history, the first Jesuit and the first to adopt the name of Francis of Assisi. His pontificate has been characterised by simplicity, attention to the poor and attempts to reform the Roman Curia.