Papa Juan XVIII

Si Papa Juan XVIII (nagadan  June or July 1009) iyo an obispo kan Roma asin nominal na namamayo kan Papal States poon January 1004 (25 December 1003 NS) sagkod sa saiyang abdication kaidtong July 1009. He wielded little temporal power, ruling durante kan struggle sa pag-ultanan ni John Crescentius asin Emperador Henry II para sa kontrol kan Roma.