The rabbis (religious leaders) of the Jews strongly opposed Jesus. They did not find something special in Christ like the Messiah. They loved their rituals. It was a great sin for them to tell God as their God. Therefore, they complained to Pilate's governor of that time, Pilatus. The Romans had always been afraid of Jewish revolutions. Therefore, to appease the fanatics, Pilate gave Jesus the painful punishment of death on the cross (crucifix).
According to the Bible, the Roman soldiers beat Jesus with whip. Wore them royal dresses, decorated the crown of thorns on their heads and spit on them and made them "the King of the Jews" in despair. Raising his own cross on the back, the Romans took him to Galgata, where he had to hang on the cross. Upon reaching Galgata, a mixture of alcohol and bile was introduced to them. In that era, this mixture was given to reduce the pain of the death penalty. Jesus denied it. According to the Bible, Jesus was crucified between two thieves.
Christians believe that while dying on the cross, Christ had taken away all the sins of all humans, and therefore whoever believes in Jesus will receive heaven. After three days of death, Jesus rose again and went straight to heaven after 40 days. 12 disciples of Christ spread their new religion everywhere. This religion is called Christianity.