Solve these clues to fill the grid.
- Tough more-or-less rigid protective covering of an animal or plant
- 3 Across
- United States operatic soprano (plural)
- 4 Across
- Any of the Scandinavian people who raided the coasts of Europe from the 8th to the 11th centuries (plural)
- 6 Across
- A piece of land held under the feudal system
- 9 Across
- A member of the ___
- 10 Across
- Relating to or belonging to the Middle Ages
- 12 Across
- A nation's ruler or head of state usually by hereditary right (plural)
- 14 Across
- Large fortified home of a king or queen
- 16 Across
- Title for a master or for God (plural)
- 1 Down
- Male ruler of a kingdom (plural)
- 2 Down
- A believer in or follower of Islam (plural)
- 5 Down
- Originally a person of noble birth trained to arms and chivalry (plural)
- 7 Down
- The social system that developed in Europe in the 8th century
- 8 Down
- The medieval principles governing knighthood and knightly conduct
- 11 Down
- A person holding a fief (plural)
- 13 Down
- A commitment to tell the truth
- 15 Down
