Fires, congestion, poor ventilation, shared beds, and high mortality made the old Hôtel-Dieu a focus of eighteenth-century criticism. Reformers increasingly treated layout, air, patient separation, records, and administration as measurable causes of hospital outcomes.
Jacques Tenon’s investigations of Paris hospitals in the 1780s helped turn institutional comparison into a programme for reform. The old hospital was not criticised only for mistaken treatments; its architecture and organisation were themselves understood as health hazards.
Revolutionary and nineteenth-century governments reorganised Parisian assistance, while a new Hôtel-Dieu building rose on the opposite side of the cathedral in the later nineteenth century. Rebuilding preserved the name but changed space, management, professional authority, and the relationship between wards and the city.
Longevity can conceal rupture. The present hospital belongs to a modern university and public hospital system, yet its continuing emphasis on vulnerable patients echoes an older obligation. The historical question is not whether one unchanged institution survived, but how successive organisations repeatedly claimed and revised the same tradition of access.