Who were the developers responsible for systematically breeding the St. Bernard lineage?

Answer

Monks at the Great St. Bernard Hospice

The St. Bernard dogs were systematically bred by the monks residing at the Great St. Bernard Hospice. This hospice was situated high in the challenging terrain of the Swiss and Italian Alps. The monks introduced these large, powerful dogs around the 17th century to aid in their life-saving work in the notoriously dangerous area characterized by heavy snow and frequent avalanches, making the monks the indispensable originators of the refined breed standard.

Who were the developers responsible for systematically breeding the St. Bernard lineage?
DogbreedSaint Bernard