An unusual feature is the huge spiral ramp of the Tour des Minimes, wide enough to allow access for horses and provisions.
The Tour des Minimes' spiral ramp made it easier to fend off sieging enemies.
mnli hypothesis: The Tour des Minimes' spiral ramp made it easier to fend off sieging enemies. premise: An unusual feature is the huge spiral ramp of the Tour des Minimes, wide enough to allow access for horses and provisions.