Next to the city gates of Nin was the Benedictine monastery of St. Ambrose. During the demolition of the medieval church of St. Michael, which was located on the site of a Roman temple, fragments of the architrave of the altar rail were found, decorated with braided ornamentation and with a carved inscription mentioning the Croatian duke Branimir (879-892) and abbot Teodobert. The inscription reads: «During the time of lord Branimir, Duke of Slavs, I, abbot Teodobert, had this altar made in honour of blessed Ambrose the Confessor, for the salvation of my soul. Whoever should read this, let them pray for me, a sinner.”