 Complete the following phrase:  The region had a distinct jurisdiction under a Voivode of Transylvania from the 12th century. Whether it used a heraldic symbol at this stage is a matter of dispute among modern heraldists. Dan Cernovodeanu dismisses the notion, arguing that there was a general uninterest in regional heraldry, manifested throughout high-medieval Hungary; similarly, Károly Kisteleki argues that: Transylvania did not have an independent coat of arms in the pre-1526 medieval Hungarian Kingdom. The Book of Knowledge of All Kingdoms claims a green flag with a red scimitar as standing for the Kingdom of Siluana or Septem Castra. The latter is a reference to Transylvania as the country of seven cities. According to historian Iulian Marțian, this name may predate 