The heart of the city is Viejo Madrid, Old Madrid, a largely 16th-century city built upon the layout of narrow, winding streets of an old Moorish settlement.
Old Madrid was mostly constructed during the 16th century.
For example, in a basic research study of 40 low-income women, Belle and her colleagues lived for many months among them as observers, confidantes, and friends, listening to what they said and noting what they did.