Question: What was the capital of the Kingdom to which George Khevenhüller build a city-fortress? 
Sentence (from "Kingdom of Croatia (Habsburg)"): The Kingdom of Croatia (Croatian: "Kraljevina Hrvatska"; Latin: "Regnum Croatiae" Hungarian: "Horvát Királyság" German: "Königreich Kroatien" ) was an administrative division that existed between 1527 and 1868 within the Habsburg Monarchy (also known between 1804 and 1867 as the Austrian Empire).
Relevant evidence: No