Pope Pius IX (born 1792)

Pope Pius IX was head of the Catholic Church from 1846 to 1878. His reign of nearly 32 years is the longest verified of any pope in history; if including unverified reigns, his reign was second to that of Peter the Apostle. He was notable for convoking the First Vatican Council in 1868 which defined the dogma of papal infallibility before taking a break in summer of 1870. The council never reconvened. At the same time, France started the French-Prussian War and removed the troops that protected the Papal States, which allowed the Capture of Rome by the Kingdom of Italy on 20 September 1870. Thereafter, he refused to leave Vatican City, declaring himself a "prisoner in the Vatican".

February 7 is the 38th day of the year in the Gregorian calendar; 327 days remain until the end of the year.