Jesus of Nazareth's public ministry took place within the Jewish society of Roman-ruled Galilee and Judaea in the first century CE. The Gospels associate its beginning with baptism by John the Baptist, after which Jesus gathered followers and taught about the kingdom of God. Historians generally regard his baptism and crucifixion as well established, while the chronology, duration, and details of particular episodes remain debated. The surviving narratives combine memories of his activity with the theological convictions of later Christian communities.

The Gospel accounts describe teaching in villages, synagogues, homes, and open gatherings. Jesus used parables and sayings to address repentance, mercy, forgiveness, wealth, and obligations to God and other people. Stories of meals with tax collectors and other socially disputed figures present a ministry that challenged accepted boundaries. Accounts of healings and exorcisms are central to the narratives and to his followers' understanding of his authority. A historical biography can describe those claims and their influence while distinguishing religious belief from what the surviving evidence independently establishes.

Jesus selected a group known as the Twelve, alongside a wider following that included women. The Gospels portray disputes over Sabbath practice, purity, and interpretation of Jewish law; these took place within Jewish religious life rather than between Christianity and a separate Jewish community already formed. His final visit to Jerusalem, including the reported action in the Temple, brought the movement into confrontation with local authorities. Roman officials crucified him under the prefect Pontius Pilate, usually dated to around 30 CE, though some scholars favor a later year. Crucifixion was a Roman punishment associated with threats to public order, and the charge of kingship was central to the accounts of his execution.

After his death, followers proclaimed that he had risen and continued the movement in Jerusalem and beyond. Paul's letters and the Gospels preserve early interpretations of his identity, teaching, death, and resurrection. The four canonical Gospels were written after his lifetime and differ in sequence, emphasis, and presentation, so they cannot simply be combined into an uncontested daily chronology. Jesus's career was brief, but the communities formed around his memory developed into Christianity and gave his teachings a lasting global influence.