Nicolaus Copernicus (19 February 1473 – 24 May 1543) was a Renaissance mathematician. He was born in a rich family in Royal Prussia, a region of the Kingdom of Poland since 1466. Copernicus had a doctorate in canon law and, though without degrees, was a physician, polyglot, classics scholar, translator, governor and a diplomat.
In 1914, because of his skills, he was hired by Pope Leo X to revise the calendar. He made the discovery that the calendar did not match the seasons and thus, it was out-dated . This discovery led him to make the heliocentric model.