Leo is the author of Cosmographia et geographia de Affrica, a foundational work in early geography and exploration. This detailed account offers a fascinating look at the African continent through the lens of historical cartography and observation.
Pope Leo XIII led the Catholic Church from 1878 to 1903. He wrote numerous encyclical letters, including On the Sect of the Freemasons, a significant work addressing the social and political concerns of his era. His writings offer a direct look into late 19th-century Catholic thought.