Papa Valentino alikuwa Papa kwa wiki chache tu kuanzia mwezi Agosti 827 hadi kifo chake mnamo Septemba 827. Alitokea Roma, Lazio, Italia. Alimfuata Papa Eugenio II akafuatwa na Papa Gregori IV. 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 Kuhusu Papa Valentino katika Kamusi Elezo ya Kikatoliki