I'm not sure at what point in church history the observation of the crucifixion of Jesus acquired the name "Good Friday." It pretty terrible to the people involved. It's hard in our day and age to understand how terrible or commonplace crucifixion was to people in the ancient world. The early church would have been horrified at the use of crosses as ornaments; they did not become standard features of Christian art until around the 4th century, after the practice was largely abandoned.
According to Martin Hengel, author of Crucifixion in the Ancient World and the Folly of the Message of the Cross, "among the Romans it was inflicted above all on the lower classes, i.e., slaves, violent criminals, and the unruly elements in rebellious provinces, not least in Judea. The chief reason for its use was its allegedly supreme efficacy as a deterrent; it was, of course, carried out publicly..."
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