Crucifixion in the Rome of Marcus Tullius Cicero
Cic. Ver. 2.5.163
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Did you dare to drag any one to the cross who said that he was a Roman citizen? I was unwilling, O judges, to press this point so strongly at the former pleading; I was unwilling to do so. For you saw how the feelings of the multitude were excited against him with indignation, and hatred, and fear of their common danger. I, at that time, fixed a limit to my oration, and checked the eagerness of Caius Numitorius a Roman knight, a man of the highest character, one of my witnesses.
And I rejoiced that Glabrio had acted (and he had acted most wisely) as he did in dismissing that witness immediately, in the middle of the discussion. In fact he was afraid that the Roman people might seem to have inflicted that punishment on Verres by tumultuary violence, which he was anxious he should only suffer according to the laws and by your judicial sentence.
Cic. Ver. 2.5.164
...that that Publius Gavius whom you crucified was a Roman citizen, and a citizen of the municipality of Cosa, not a spy of runaway slaves.
Cic. Ver. 2.5.165
...Gavius, but men who say that they saw him at the time that he was being dragged to the cross, while crying out that he was a Roman citizen. And you, O Verres, say the same thing. You confess that he did cry out that he was a Roman citizen; but that the name of citizenship did not avail with you even as much as to cause the least hesitation in your mind, or even any brief respite from a most cruel and ignominious punishment.
Cic. Ver. 2.5.166
ought not he, whoever he was, whom you were hurrying to the cross, who was a stranger to you, to have been able, when he said that he was a Roman citizen, to obtain from you, the praetor, if not an escape, at least a respite from death by his mention of and claims to citizenship?
...
Cic. Ver. 2.5.169
enemy to the individual, but to the common cause of liberty. For what was your object in ordering the Mamertines, when, according to their regular custom and usage, they had erected the cross behind the city in the Pompeian road, to place it where it looked towards the strait; and in adding, what you can by no means deny, what you said openly in the hearing of every one, that you chose that place in order that the man who said that he was a Roman citizen, might be able from his cross to behold Italy and to look towards his own home? And accordingly, O judges, that cross, for the first time since the foundation of Messana, was erected in that place. A spot commanding a view of Italy was picked out by that man, for the express purpose that the wretched man who was dying in agony and torture might see that the rights of liberty and of slavery were only separated by a very narrow strait, and that Italy might behold her son murdered by the most miserable and most painful punishment appropriate to slaves alone.
Cic. Pis. 18.42
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[42] Should I, if I were to see you and Gabinius both nailed to a cross, feel greater rejoicing at the laceration of your bodies, than I do at the tearing to pieces of your reputations?
Appian, The Civil Wars
CHAPTER XIV
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[120] On account of this vote Crassus tried in every way to come to an engagement with Spartacus so that Pompey might not reap the glory of the war...
They divided themselves in four parts, and continued to fight until they all perished except 6000, who were captured and crucified along the whole road from Capua to Rome.