This chapter describes the endowment that Nurbanu Sultan established, including a Friday mosque with many dependencies (schools, hospital, soup kitchen, inn) on the hills of Üsküdar. Furthermore, it analyses the economic relations between the charitable and the revenue-generating buildings and properties. Among these revenue-generating buildings counted the Çemberlitaş Hamamı, together with the Atik Valide Hamamı and the Büyük Hamam and the Havuzlu Hamam. Like a large, immobile grandee who lived a pious life in his mansion, distributing charity in the form of food, money and medicine to his kapı halkı, his retinue of dependents living in the neighbourhood, the mosque complex was not able to conduct the business necessary to sponsor that charity. Rather, it sent out its four sons (the four hamams) and relatives of its sons’ generation (residences, shops, workshops, mansions, farms and pastures) to do business on its behalf and to generate the large sums of money it needed to sustain itself and its philanthropic activities.