Interesting quotes from
https://en.wikipedia.org/wiki/Catholic_Church_and_health_care#Middle_Ages:
It was common for monks and clerics to practice medicine and medical students in northern European universities often took minor Holy orders. Mediaeval hospitals had a strongly Christian ethos, and were, in the words of historian of medicine Roy Porter, "religious foundations through and through", ...
..In keeping with the Benedictine rule that the care of the sick be placed above all other duties, monasteries were the key medical care providers prior to 1300. Most monasteries offered shelter for pilgrims and an infirmary for sick monks, while separate hospitals were founded for the public...
...Crusader orders established several new traditions of Catholic medical care.[24] The famous Knights Hospitaller arose as a group of individuals associated with an Amalfitan hospital in Jerusalem, which was built to provide care for poor, sick or injured pilgrims to the Holy Land...
...Small hospitals for pilgrims sprung up in the West during the early Middle Ages, but by the latter section of the period had grown more substantial, with hospitals founded for lepers, pilgrims, the sick, aged and poor. Milan, Siena, Paris and Florence had numerous and large hospitals. "Within hospitals walls", wrote Porter, "the Christian ethos was all pervasive"....
