Strongly recommended! Although it is far from the central area, it can be reached by subway and then by foot. Along the way, it can climb up the ancient city wall and see the representative red roof of Istanbul. Although the exterior of the church was maintained when I went, the interior frescoes can only be described with exquisite elegance. If you know something about Christianity, it will be more interesting to visit. There was a souvenir shop outside the church. The brick paintings inside were so beautiful that I carried several pieces home.