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A titular church in Rome, Italy, is assigned to a cleric of the Catholic Church who is created a cardinal. These are churches in the city, under the Diocese of Rome, which are assigned to cardinals as honorary designations that symbolise their relationship to the diocese and to its bishop, the pope. There are two types of titular churches: titles and deaconries. A title is a titular church that is assigned to a cardinal priest (of the second order of the College of Cardinals), whereas a deaconry is a titular church that is assigned to a cardinal deacon (the third order). When a cardinal priest or a cardinal deacon is then appointed a cardinal bishop (the first order), he is typically transferred from his titular church to the vacant title of a suburbicarian diocese, in the vicinity of Rome. There are 232 current titular churches, 164 of which are titles and 68 of which are deaconries (San Giuliano Martire pictured). Twenty-four titular churches are currently vacant. (Full list...)