Covering five square kilometres, Laodikeia lies on a plateau surrounded on three sides by rivers, including the Lycus, and settlement here dates from around 5,500 BC. Seleucus Antiochus II named the city after his wife Laodike around the middle of the third century BC. Its impressive remains include the largest ancient stadium of Anatolia, and three commercial agoras show that it was an important trading centre. It became a Christian place of pilgrimage in the early Byzantine period – Laodikeia is one of the Seven Churches mentioned in the Book of Revelations. In 2017 a large floor mosaic was discovered, thought to be part of a gymnasium