Metropolis of Pergamon
The Metropolis of Pergamon () was an ecclesiastical territory (diocese) of the Ecumenical Patriarchate of Constantinople in western Asia Minor, modern Turkey. Christianity in the city of Pergamon (modern Bergama), was introduced already from 1st century AD, while the local Christian community comprised one of the seven Churches of Asia mentioned at the Book of Revelation, written by John of Patmos. The bishopric of Pergamon was twice promoted to a metropolis: during the 13th–14th centuries, as well as for a short period in 1922. Today the "Metropolis of Pergamon and Adramyttium" is the see of a titular metropolitan.
Pergamon Bridge
For urban development, such substructions are regarded as particularly useful for providing large open spaces in densely populated inner city areas. This was also the case in Pergamon, as the building of the Serapis Temple required the bridging of an entire section of the River Selinus in order to create sufficient space for a large platform in front of the temple.