Suburbicarian sees are a group of dioceses located in the vicinity of Rome, Italy. They are historically significant as they were once part of the larger ecclesiastical structure of the Roman Catholic Church. Each suburbicarian see is headed by a bishop, and these bishops often hold the title of cardinal. These sees include notable dioceses such as Ostia, Albano, and Frascati. The suburbicarian sees play a vital role in the governance of the Church, particularly in the election of a new pope, as the cardinals from these dioceses participate in the conclave.