Since it was done to thousands of people and involved nails, you'd probably assume we have skeletal evidence of ... nails would have been driven through the heel bones, and in the second case ...

Law enforcement officials who are tasked with identifying a body based on partial skeletal remains have a ... the seven bones that make up the ankle, heel and rear part of the arch in a human ...

Right calcaneus from 1st c AD Gavello, Italy, showing possible evidence of crucifixion. Skeletal evidence of crucifixion, a practice the Romans used for centuries as punishment, is exceedingly rare.