The see is in the City of Westminster, the Archbishop's cathedra or seat is located at the Metropolitan Cathedral Church of the "Most Precious Holy Blood, Saint Mary, Saint Joseph and Saint Peter", usually referred to as Westminster Cathedral, which is set back from Victoria Street.
He also oversaw a contest for architecture students from the Catholic University of America to design the altar and chair used by Benedict XVI at the Mass at the Washington Nationals baseball stadium.
The bishop's seat (Cathedra) was located at the Cathedral Church of St Mary, Limerick.
The see is in the town of Wrexham where the bishop's seat is located at the Cathedral Church of Our Lady of Sorrows.
The cathedral church of the diocese is the Cathedral Church of St Paul, Sale.
The offices of the Diocesan Bishop are located in the Chancery of the Western Diocese in Park Ridge, Illinois and the cathedra or chair of the bishop is located at All Saints Cathedral Polish National Catholic Church in Chicago.
The Military Ordinary's seat is located at the Co-cathedral of Saint Jacques-sur-Coudenberg (Sint-Jacob op de Koudenbergkerk) in Brussels, Belgium.
The Bishop of Ourense has his cathedra (Latin, "chair") in the Catedral de la Virgen Madre de los Milagros in Ourense and his jurisdiction covers all the 28 districts and 735 parishes of the Province of Ourense.
St Patrick's Cathedral, Parramatta is the seat of the Catholic Bishop of Parramatta, currently Anthony Fisher OP.
St Mary's Cathedral, Perth, officially the Cathedral of the Immaculate Conception of the Blessed Virgin Mary, is the cathedral church of the Roman Catholic Archdiocese of Perth, and seat of its Archbishop, currently Timothy Costelloe.