One of the most beautiful structure on the world, ...

One of the most beautiful structure on the world, it is almost 1500 years old and should be on everyone's list "have to see" in ISTANBUL. It's worth it to know basic about history of this beautiful place before you visit it !!! Then you can enjoy it to its maximum.
To avoid long queue you need to get there before 9am or be ready to pay about 100TL extra to local guide to let you skip the long line. (As we did)