Brazen Bull
While uncertain if the story of this torture device was real, it is certainly compelling. Invented by Perillos of Athens, the Brazen Bull was a new torture and execution device. He presented his invention to the known tyrant ruler of Sicily at the time, Phalaris. It was meant to be used on those that harmed others or did the worst crimes possible. Of course, the device appeared to be a bull made of bronze. It worked by putting a person inside the opening, then locking it behind them.
You’d then place a fire underneath it, thus heating the bull made of bronze. Essentially, the person would be roasted to death and likely scream from the pain until their passing breathe. Phalaris liked the idea of the machine but needed an example to see if he truly wanted it. Therefore, he put Perillos inside and roasted him alive. It is uncertain how many were executed via Brazen Bull. Yet one would have to assume it would be one of the most painful experiences ever!