Heliograph tower. Sending messages with coded blinks.
Tomb/catacombs under an important building.
cheese/wine cave were the goods are ripened.
Scriptorium where books are hand copied.
Fighting arena for bulls or convicts as entertainment.
Guillotine or Gallows for disposing of persons.
Gunpowder Mill. A marble wheel on a marble block turned by water or wind that crushes gun powder kernels into fine powder.
Leper colony in a walled off area.
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