Hagia Sophia, now known as the Ayasophya Museum, is a former Greek Orthodox patriarchal basilica (church) and later an imperial mosque in Instanbul, Turkey. It is considered one of the greatest and most beautiful buildings in history.
If you've never been to Istanbul, Iznik tiles are amazing ceramic designs from the ottoman empire, and there are so many amazing patterns. My visit to Istanbul still influences my style so much. Iznik tile decoration - The Harem, Topkapi Palace