Zach and Ben World's Fair San Marino By zponzio Dec 20, 2015 The Republic of San Marino founded in 301 AD republic was founded in ad 301 by Marinus, a Christian stonecutter who fled from Dalmatia to avoid religious persecution Dec 21, 2015 San Marino joined the Ghibellines and was therefore interdicted by Pope Innocent IV in 1247–49 For a time, it joined the Ghibellines and was therefore interdicted by Pope Innocent IV in 1247–49