Istanbul is often considered the cross-roads of the world, and for good reason. This land has been home to mythological figures, raiding crusaders, and modern day avengers, making for a complicated and beautiful tapestry or new and old. Begin at the Patriarchate at Fener, the heart of Orthodox Christianity. Here your guide explains to you the importance of Constantine the Great's declaration of Christian as the religion of the Roman Empire, who subsequently moved the seat of the church here to Istanbul. Next you will visit the Church of Panagia of Blachernae, where it is said that the Hagiasma (Fountain of Holy Water) will cure all of your health problems. Even the emperor used to come here for cleansing! Next, we head to St. Savior in Chora (Kariye Museum) which was once a Byzantine monastery dedicated to Jesus. Here, you'll find beautifully preserved mosaics and frescoes. Pantocrator (Zeyrek) is the next stop, and in this labyrinthine complex, you will discover churches, funerary chapels, baths, hospice for the aged, and even a hostel for travelers arriving today. It is an incredible monument to the ingenuity of the Byzantine architects. Moving towards the water, we find the incredible remains of the Church of St. Mary Pammacaristos (Fethiye). These 11th century ruins display the aesthetic refinement of the Paleologan Age, and was once home to the Patriarchate after the conquests. Continuing our historical adventure, we head to Zoodochos Pege at Balıklı, which houses an underground cistern filled with gold fishes related to the miracle of fishes. From here we can also visit St. Sergius and Bacchus, both prime examples of Byzantine architecture. You may find yourself thinking that it looks like a miniature Hagia Sophia, and you wouldn't be wrong, because it's the precursor to that beautiful temple! The day is an incredible chance to learn the history of these cross-roads from the architecture and monuments left behind by generations of crusaders and ecclesiastics.