Advanced growth-enhancing building of the Industrial Era. Requires Aqueduct.
The Hospital is vital for continued growth of the population in already big cities. Even with all the advancements in contemporary farming, further means are necessary to make really big cities. The Hospital comes along, directly bumping Food production in the city.
It is an interesting decision to represent medicine in the game as a late-game means for continued population growth. Quite fitting, although maybe not that realistic.
A hospital is an institution for diagnosing and treating the sick or injured, and for housing them during their recovery. Many hospitals are also teaching institutions, where student doctors and nurses learn their trade. The earliest hospitals were temples to certain gods associated with health and healing. Religious hospitals were established in Sri Lanka by 430 BC, and King Asoka of India created a chain of hospitals across Hindustan around 230 BC.