Complex sentence: It is the official residence of the Wodeyars-the erstwhile royal family of Mysore that ruled the princely state of Mysore for over seven centuries, and also houses two "durbar halls" (ceremonial meeting hall of the royal court).
Split into simpler sentences: It is the official residence of the Wodeyars-the erstwhile royal family of Mysore, which ruled the princely state of Mysore for over seven centuries. The palace also houses two "durbar halls" (ceremonial meeting hall of the royal court).