 Zadar was the capital of Byzantine Dalmatia, but an example of Carolingian architecture is also found there, indicating that Zadar may once have belonged to the Franks and possibly explaining a visit of Bishop Donatus to Charlemagne in Dietenhofen.Since Zadar belonged to Venice, the bishops of Grado had exercised patriarchal jurisdiction over it.In 1276 Patriarch Ægidius summoned Archbishop John with his suffragans to the Council of Grado where they were, however, represented by deputies.