Last summer I spent a few days in Istanbul, of course with a famous group of friends. We couldn't see everything because we had little time, but we went to see the oldest building, the Sofia Aja Mosque. As you can see in the photos, we had to wear their costume to enter the mosque. And slippers are mandatory. Of course, we followed tradition and saw the most beautiful and oldest building. I hope that whoever goes to Istanbul will not miss the chance to see it