Old Baku is Icheri Sheher (Inner City) - a small city surrounded by two rows of fortress walls. With a population of only 2-3 thousand people, he had very expensive two rows of powerful fortress walls, no less powerful fortifications in the bay of the city and grandiose towers for various purposes at that time. Beautiful original medieval architecture has been preserved here. The dense local limestone allowed for architectural masterpieces decorated with unique deep stone carvings. The city was divided into quarters (mahala), each of which had its own mosques, baths, caravanserais. At the head of the city on top of the city hill stood the majestic complex of the Shirvanshah Palace.