Page "Death by sawing" Paragraph 4

Throughout the time of the Roman Empire this method of execution was uncommon.

However, it was used extensively during the reign of Emperor Caligula when the condemned, including members of his own family, were sawn across the torso rather than lengthways down the body.

It is said that Caligula would watch such executions while he ate, stating that witnessing the suffering acted as an appetiser.