The Sultan Ahmed Mosque ("Blue" Mosque) is the national mosque of Turkey as still operates as a mosque today. On our first morning in Istanbul, we were woken up at 5:45am by the booming call to prayer coming from the loudspeakers. The loud singing echoed throughout the streets.
Directly across from the Blue Mosque is the Hagia Sophia. It was originally a Christian church, then became a mosque, and was turned into a museum by Atatürk. The park between the two buildings is the Sultanahmed Square (I think...I'm not real solid on these historical details. I am loosely relying on Wikipedia and my memory). This is also the site of a Roman Hippodrome.
The surrounding square/neighborhood has a handful of ruins and relics from past civilizations that occupied the area. This one had Greek or Roman writing on it.
This was the nearest big street by our place. It had many shops, street vendors and restaurants. Many of the restaurants in Turkey had very aggressive "promoters" out on the sidewalk who tried to get you into their place. We only got pulled into one place, only after they promised us free beer and coffee. Alas, it was the Turks who got the last laugh. That story will come later...