There is no single straight line from an ancient refuge to a modern medical centre. Hospitals emerged in different religious, civic, military, charitable, and political settings.
Some institutions offered hospitality to travellers, poor people, or the chronically ill; others separated people during epidemics, cared for soldiers, or linked treatment with religious obligation. Endowments could support food, beds, medicines, attendants, and practitioners. The balance between cure, custody, shelter, and spiritual care varied by place and period.
Endowed hospitals across medieval Islamic cities, including the Al-Mansuri Hospital in Cairo, joined wards, pharmacy, medical personnel, and charitable provision. European hospitals developed through monasteries, municipalities, foundations, and later state systems. Elsewhere, hospitals were created through courts, missions, colonial administrations, mutual-aid organisations, and local philanthropy.
Calling all these institutions early versions of the same modern hospital would erase their distinct purposes. The useful comparison asks who was admitted, who paid, which kinds of care were offered, how work was organised, and what records or buildings allowed the institution to endure.