The commercial network of Dilmun lasted for almost 2,000 years, after which the Assyrians took control of the island in 700 BC for more than a century. This was followed by Babylonian and Achaemenid rule, which later gave way to Greek influence during the time of Alexander the Great's conquests. In the first century AD, the Roman writer Pliny the Elder wrote of Tylos, the Hellenic name of Bahrain in the classical era, and its pearls and cotton fields. The island came under the control of the Parthian and Sassanid empires respectively, by which time Nestorian Christianity started to spread in Bahrain. By 410–420 AD, a Nestorian bishopric and monastery was established in Al Dair, on the neighbouring island of Muharraq. Following the conversion of Bahrain to Islam in 628 AD, work on one of the earliest mosques in the region, the Khamis Mosque, began as early as the seventh century AD. During this time, Bahrain was engaged in long distance marine trading, evident from the discovery of Chinese coins dating between 600–1200 AD, in Manama.