Today is Good Friday. It's been a long time since I've been in a church to "celebrate" the gruesome death which we're taught took place that day in the Roman province of Judea. I wonder how it's celebrated by the One Holy, Catholic and Apostolic Church these days. If I recall correctly, proceedings in my days as an altar boy were appropriately solemn. Are they still, or has the effort to make observances cheery and attractive resulted in a kinder, gentler version of the crucifixion?
Even as idealized in El Greco's painting shown above, a crucifixion must have been a horrible death. Just how the Romans crucified people is a matter of some dispute, but there's no doubt it took place. Some question whether the nails were placed as depicted here; sometimes the crucified are shown as tied to a cross.
Presumably, this particular crucifixion, if it took place as described in the Gospels referring to "Doubting Thomas," involved the use of nails as Thomas is shown the wounds which resulted. Whether it took place is disputed by some, of course.
Unless one is a Christian believer and accepts the Gospels, the story of the Passion, the death and resurrection, isn't immediately acceptable. Some parts of it, though, seem credible. By this I mean that based on information available, some of what is said to have taken place could have taken place, though very little. We can conclude that if we take a Roman view, and make reference to non-Christian sources.
We know at least that Pontius Pilate (Pontius Pilatus, properly) existed, and was a prefect governing the province of Judea around the time in question. This has been confirmed by the so-called "Pilate Stone" which is a damaged block of limestone found in Caesarea Maritima (modern Caesarea), bearing an inscription in which he is named as making a dedication to Augustus and Livia. Caesarea Maritima was the Roman administrative capital of the province and so would have been where Pilate stayed and from which he governed. However, he no doubt travelled to and stayed in Jerusalem from time to time and as appropriate, and it makes sense he would have been there at an important period of time such as Passover.
Tacitus refers to both Pilate and "Christus" when he writes of the fire which destroyed much of Rome while Nero was Emperor. Tacitus relates that Nero sought to blame Christians for the fire, and also notes that "Christus, from whom the name [Christians] has its origin, suffered the extreme penalty during the reign of Tiberius at the hands of one of our procurators, Pontius Pilatus...." So, there is a non-Christian source which, though it indicates Pilate was a procurator instead of a prefect/governor, states that such persons existed and "Christus" was put to death by a Roman official.
There seems to be no contemporaneous Roman account of the crucifixion, however. Flavius Josephus makes a reference to it, and Pliny the Younger while a governor famously wrote the Emperor Trajan regarding how to treat Christians, but Josephus and Pliny, like Tacitus, wrote long after these events were said to have taken place. By the time they wrote, Christians were known of and deemed suspicious and anti-social among the Roman elite. No sources are cited by any of these writers, and what they knew may have been based on rumor, or have formed part of the "backstory" of the Christian faith for many years at that time. For that matter, the Gospels were written decades later as well.
We have a reasonable basis on which to say that Pilate existed and was prefect/governor of Judea during the reign of Tiberius. There is reason to think Judea was a difficult province to govern, Herod the Great was a client-king of Rome, but the Jews were thought even then to be peculiar and the Herodian dynasty was known to be made up of people who wouldn't hesitate to kill each other as needed. Augustus once remarked that he would rather be Herod's pig than one of his sons. After his death Judea was split into smaller kingdoms, and Rome assumed rule of the area after the death of the last Herod, Herod Antipas, circa 39 CE. The Jews revolted against Roman rule 30 years later.