My husband and I stayed at the Marmara Guest House for 3 nights and couldn't have picked a better place in terms of location for exploration of the old town (the Blue Mosque, Aya Sofya, etc are only a 5 minute walk away). Location aside, the guest house is spotlessly clean and the breakfast spread is absolutely amazing. We would not hesitate to recommend this place to anyone and if ever we were to return to Istanbul, this would be the top of our list of places to stay. Many thanks to all the team for making our stay so lovely!