"Custos" is a Latin term meaning "guardian" or "keeper." In various contexts, it refers to someone who is responsible for overseeing and protecting something valuable, such as a collection, property, or information. The role of a custos can be found in museums, libraries, and other institutions where preservation and security are essential. In the context of Roman Catholic Church, a custos is a title given to a person in charge of a religious community or a specific area, often overseeing the administration and spiritual well-being of the members. This role is significant in maintaining the traditions and practices of the community.