Papa Sixtus IV, O.F.M. (21 Julai 1414 – 12 Agosti 1484) alikuwa Papa kuanzia tarehe 1/9/25 Agosti 1471 hadi kifo chake. Alitokea Celle, Savona, Italia. Jina lake la kuzaliwa lilikuwa Francesco della Rovere. Alimfuata Papa Paulo II akafuatwa na Papa Inosenti VIII. Orodha ya Mapapa https://www.vatican.va/content/vatican/en/holy-father.index.html#holy-father https://www.vatican.va/content/vatican/en/holy-father.index.html#holy-father Papa Sixtus IV katika Kamusi Elezo ya Kikatoliki