Especially in medieval markets and the like, birds of prey are exhibited. These animals often are held in small cages and tied shortly to a stick, without shelter from inclement weather nor permanent access to fresh water, day after day. In many cases the shows are the only opportunity they have to fly, and some not even then.
The life of these shy and wild animals consists of traveling from one place to another, with no chance of escape, without respect to their daily cycles, not even when it comes to night birds, unable to hide from the eyes of the people, etc. In short they are not allowed to be wild, actually not even to be birds anymore.