The Anastasi - the church of the ResurrectionRomano-Byzantine Cathedral in Beirut was built in the fifth century and destroyed in 551 AD by an earthquake.
See:
- A. Makris, The Oldest Church in the City of Beirut - http://world.greekreporter.com/2012/03/17/greek-orthodox-cathedral-of-saint-george-the-oldest-church-in-the-city-of-beirut/