In theory, Sigerist notes, "Christianity gave the sick man a position in society that he had never had before, a preferential position. When Christianity became the official religion of the Roman Empire, society as such became responsible for the care of the sick."

But in practice, this preferential position had its drawbacks. Conditions in the medieval hospitals varied widely. Certain of them, well financed and well managed, were famous for their humane treatment and their cheerful, spacious surroundings. But most were essentially custodial institutions to keep troublesome and infectious people off the streets. In these places, crowding, filth, and high mortality among both patients and attendants were the rule.

All this soon led to the notion that one avoided a hospital if at all possible. Wealthier-and more worldly-patients were treated in their homes by apothecaries and barber surgeons; only the traveler, the very poor, and the hopelessly ill found their way into the hospitals, and for these people it was indeed "an antechamber to the tomb."

The Renaissance and Reformation loosened the Church's stronghold on both the hospital and the conduct of medical practice. New medical schools sprang up at Salerno, Bologna, Montpellier, and Oxford; in England, Henry VIII dissolved the monastery-hospital system altogether, and a network of private, nonprofit, voluntary hospitals was started to take its place.

A medical school was associated with St. Bartholomew's in 1622; it has thus been a teaching hospital for nearly three hundred and fifty years. Among its eminent surgeons and physicians have been William Harvey, the discoverer of the circulation of the blood; Percival Pott, who first described Pott's disease, tuberculosis of the spine; the brilliant and inventive surgeon John Abernethy; and Sir James Paget, the man who described Paget's disease.