The Martyrium Hall of the Apostle Philip in Hierapolis (AD 400s)
The large domed Martyrium Hall was built in the 400s about forty yards to the left of the Martyrium Church of the Apostle Philip in Hierapolis (modern Pamukkale). The hall probably provided a gathering and teaching place for the many Christian pilgrims that went to the Martyrium Church. The octagonal-shaped Martyrium Hall has a circular central area that was surrounded by eight small chapels and four triangular courtyards in the corners. Although the hall has been badly damaged by earthquakes, you can still see the travertine stone supports of the original wood dome.