This fill-in-the-blank viewing guide follows the PBS NOVA episode, Hagia Sophia: Istanbul's Mystery available on PBS and YouTube. Included is a regular worksheet, a modified copy with word bank, and a complete answer key. This is a great resource for a world history class, a physics class, an introduction to architecture course, or other science and social studies classes. This can be used as a stand alone activity, and it's perfect for a substitute teacher day!