We hired a company called Istanbul Walks which provided us with a guide named Selma Şen for a walking tour through the Blue Mosque area. We strolled through the old neighborhoods, toured little visited sights, and thoroughly enjoyed her information about historic Constantinople and Istanbul. One of the sights we saw was the Petty Hagia Sophia. The structure and its history is very similar to the Hagia Sophia. It was built by Justinian I as a church and later minarets were added and it was turned into a mosque. While the large Hagia Sophia is now a museum, the petty Hagia Sophia is still a functioning mosque.
Street food in Istanbul is plentiful and everywhere people are in a hurry: roasted corn, roasted chestnuts, hot salep. On either side of the Galata Bridge barbecue carts grill freshly caught fish and slip the fish into a french roll for a delicious fast sandwich. Along the waterfront, mussel vendors do a brisk drop-in business. Stop by, snack on a few mussels, then move on.