Ertunga runs an excellent tour group. For the Istanbul leg of our trip, we had one of his guides take us to the main Old Istanbul sites, and the guide had a remarkable ability to time things such that we never waited more than 10 minutes for entry. He was also very knowledgeable. For the 7 Churches leg of our tour, we had a very enjoyable private tour with Ertunga, his driver, and my family of 4 traveling in a very comfortable, large passenger van from place to place. Ertunga knows his stuff and we learned a great deal about these very important places, including their larger signicance at the the time Revelation was written. Even as a non-Christian traveling with my Christian family, it was fascinating. I highly recommend Ertunga’s tours.