Write a purpose statement for this paragraph. Begin your sentence with "The purpose of this paragraph ...".

"While Istanbul and Ankara are the two biggest and most important cities in Turkey, they are very different in many respects. First of all, the two cities' roles are different. Ankara is the capital of Turkey, and is home to the country's parliament, high court, and most of its government buildings. Istanbul, on the other hand, is Turkey's cultural and financial center. Most of the country's biggest cultural events, such as conferences, concerts and exhibitions are held there. It is also the seat of many national and international companies' Turkish headquarters. Secondly, Istanbul and Ankara have also had very different histories. Before Ataturk designated it the capital of the newly founded Turkish republic in 1923, Ankara was a small, dusty central Anatolian town of little significance. On the other hand, Istanbul was founded by Emperor Constantine in 330 as the capital of the Byzantine Empire, and, after that empires' fall in 1453, continued as the capital of the Ottoman Empire until 1922. Finally, the cities' styles are also very different, and this difference is a direct result of their different roles and histories. Ankara is green, leafy, quiet, organised, and will not hold a casual visitor's attention for very long. In contrast, Istanbul is noisy, chaotic, an intriguing mix of the old and new. To sum up, Istanbul differs from Ankara in many respects such as role, history and style."