I have taken many tours around the world, and this was at the very top of the list. I will come back to Istanbul for several days and make sure I reserve Semih well in advance. He is very knowledgeable, articulate, friendly, and I left the tour surprised at how many things I learned about language, religion, and history beyond the routine description of monuments we visited. Semih is especially helpful in navigating the marketplace and working with merchants whom he knows.