Then, as now, Bishops made regular visits at intervals _ad limina_--that is, to the Pope as Chief Bishop of the Church; and according to tradition Pope Innocent called their attention particularly to this hospital of Santo Spirito, one of his favourite institutions, and suggested that every diocese in Christendom ought to have such a refuge for the ailing poor. The consequence was the erection of hospitals everywhere throughout Europe. Virchow has told the story of these hospital foundations of the Holy Ghost, as they were called, and makes it very clear that probably every town of 5,000 inhabitants everywhere throughout Europe at this time had a hospital. The traditions with regard to France are quite as complete as those that concern Germany and the great hospitals of London--St. Thomas's; St. Bartholomew's, which had been a priory with a house for the care of the poor, but was now turned into a hospital; Bethlehem, afterwards Bedlam; Bridewell, and Christ's Hospital, the first of which afterwards became a prison, while Christ's Hospital, though retaining its name, became a school. The Five Royal Hospitals, as they were called, were either founded, or received a great stimulus and thorough reorganization, during the thirteenth century. It would be easy to suppose these hospitals were rather rude structures, inexpertly built, poorly arranged, and above all badly lighted and ventilated. They might be expected to furnish protection from the elements for the poor, but scarcely more, and probably became in the course of time hotbeds of infection because of their lack of air and uncleanness. As a matter of fact, they were almost exactly the opposite of any such supposition. Those in the larger towns at least were model hospitals in many ways, and ever so much better than many hospital structures erected in post-medieval centuries. Indeed, the ordinary impression as to the medieval hospitals, and their lack of suitability to their purpose, would apply perfectly to the hospitals of the latter half of the eighteenth and the early nineteenth centuries. It is because our generation still has the memory of these hospitals of the past generation, and assumes that if these were so bad, the hospitals of an earlier time must have been worse and the hospitals of the medieval period must have been intolerable, that the derogatory tradition with regard to medieval hospitals and many other medical subjects maintained itself until the coming of real information with regard to them.