Staying at Marmara guesthouse was an incredible experience. As Istanbul was once Constantinople the guesthouse building felt very european. Breakfast at the terrace was mesmerizing. You could see the Marmara sea while eating breakfast. Breakfast buffet was delicious. I totally recommend to stay at Marmara guesthouse. Only 3 minutes walk to the Blue mosque the location is perfect for everyone. You could also walk to the sea shore to the south in 5 minutes. Loved it, I will definetly go back to Istanbul and stay here.