Body: "Law of the Roman Catholic Church" is the field of the legal system of the Christian Western empire during the middle-age.
People study "Law of the Roman Catholic Church" in order to understand the legal system of the Catholic Church.
Some subfields in "Law of the Roman Catholic Church" include Law, theology, history.
Pietro Cardinal Gasparri, Aquinas Thomas, Pope Benedict XVI are some authorities of "Law of the Roman Catholic Church".