Archbasilica of Saint John Lateran

Archbasilica of Saint John Lateran, in Rome, Lazio, is the cathedral church of the Diocese of Rome and one of Rome’s four major papal basilicas. Its documented history is central to its significance. A basilica was established here in the early 4th century under Emperor Constantine.

The complex was repeatedly altered and rebuilt; major later interventions include the Baroque rebuilding associated with Francesco Borromini. The principal construction chronology is 313–318; substantially rebuilt in later centuries. Architecturally, Early Christian foundations with major Baroque and later interventions.

Religious significance is centered on Saint John the Baptist. Important observances include: Major papal and diocesan liturgies; Traditional stop on the Seven Churches pilgrimage. The site is officially recorded as Archbasilica of Saint John Lateran.

It is administered or represented by Holy See. It remains an active Christian place of worship, so liturgies, feast days and pilgrimages can shape how the site is experienced. Visitors should use the official website for current access arrangements, especially around major religious observances.