What machine did they use to behead people back then

Answer:a guillotine (this was used on marie antoinette)

Explanation: guillotines were rectangle and made out of wood they had a sharp blade that was held up by the rope the rope would be tied off and the victims head placed in a holder then the person taking care of the beheading would cut the rope and the victims head would fall off if they didn't have a guillotine they would use a sword or axe

guillotine

Explanation:

is an apparatus designed for efficiently carrying out executions by beheading.