Archbishop Lucas helped instigate a civil war between two rulers with this name that resulted in Ladislaus II being crowned instead. The Hilandar Monastery was founded by a ruler with this regnal name, which was given to all but one king of the Nemanjić (“NEH-mahn-yitch”) dynasty. Mercurius stole the Holy Dexter from a ruler with this name who married Gisela of Bavaria. Another ruler with this regnal name expanded the Syntagma with his Dušan (“du-SHAN”) Code. A ruler with this name defeated his uncle Gyula (-5[1])(“JOO-luh”) the Younger and feuded with Holy Roman Emperor Conrad II after the death of his brother-in-law Henry II. That Árpád ruler with this (10[1])name was crowned (10[1])by Pope Sylvester (10[1])II in the year 1000 CE for (10[1])promoting Christianity among the Magyars. (10[1])For 10 points, give this name of a saint and first king of Hungary. ■END■ (10[2]0[2])