castles  landscape photography  tulips  laleler  ilkbahar  spring  kaleler  walls of constantinople  istanbul  

Wonder Pink Tulips in front of the Seven Towers of Castle in Istanbul City. These castles sometimes are called as Walls Of Constantinople. The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul in Turkey) since its founding as the capital of the Eastern Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built.