Opera by Bela Bartok: Bluebeard’s __
Puzzle 1 of Sailing Hard Pack
Question is: Opera by Bela Bartok: Bluebeard’s __
and the answer is: CASTLE
Word Meaning:
CASTLE — A large residential building or compound that is fortified and contains many defences; in previous ages often inhabited by a nobleman or king. Also, a house or mansion with some of the architectural features of medieval castles.
Definitions from Wiktionary.