It is assumed that '' ' Beylikdüzü ' '' was first settled by Greeks from Byzantion in the second century AD as a farming village . It later became a popular resort for residents of Constantinople in the Byzantine Empire , a status that continued after the Fall of Constantinople to the Ottoman Empire . The region was referred to as " Garden " in the later Ottoman period , and following the foundation of the Turkish Republic was called " Kavaklı , " after the large number of poplar trees , a name which was used until 2003 . The modern name means " Plains of the Beylik . " Beylikdüzü is populated especially after the 1999 İzmit earthquake by the people from older districts of Istanbul who preferred to move to newly constructed buildings in Beylikdüzü because of their fear for safety of the old buildings . When the Metrobus ( rapid bus system ) is extended from Avcılar to Beylikdüzü in 2012 , Beylikdüzü is affected by the second wave of migration . With the advance of Metrobüs the perception of " distance " has changed and places which seemed far away before became closer , so many moved to Beylikdüzü . Its population has grown from around 3000 in the early 1990s to 350,000 by 2018 . Since the population of Beylikdüzü consists mostly of migrants from other districts of Istanbul or Turkey , and Beylikdüzü is a relatively recently established city , Beylikdüzü has gained a welcoming atmosphere for the newcomers without having any social stratification . The popularity of Beylikdüzü has increased greatly in the last few years and the region became a hot spot for residential and commercial investments . Beylikdüzü has the highest rapid increase in the land and property value in Turkey , making its investors richer in a very short time . Beylikdüzü was one of the few municipalities in Turkey that switched from AKP to CHP in 2014 with an overwhelming ( > 10 % ) vote
1999 İzmit earthquake
1999 İzmit earthquake
Beylikdüzü