Hagia Sophia has served over the centuries as one of the greatest houses of worship in both the Christian and Muslim worlds. Hagia Sophia marks the high point of Byzantine architecture and is the pinnacle of that society's 6th century glory days. It remains one of the most important and impressive structures on our planet. Subscribe at http://goo.gl/8iBEnS for weekly updates on more European destinations.

Visit http://ricksteves.com/tours to learn about Rick Steves' European tour packages, including the Best of Istanbul in 7 Days.

Visit http://ricksteves.com for more information on the "Rick Steves' Europe" TV series — including episode descriptions, scripts, participating stations, travel information on destinations, and more.