Westminster Cathedral, officially the Metropolitan Cathedral of the Most Precious Blood, is the largest Roman Catholic church in England and Wales. It is located in the City of Westminster, London. The cathedral was designed by John Francis Bentley in a neo-Byzantine style and was completed in 1903. It is notable for its striking red-and-white striped brick exterior, extensive use of marble, gold, and mosaics inside, and a spacious nave with domical vaulting. The cathedral is the seat of the Archbishop of Westminster and holds significant religious and historical importance as the mother church for Roman Catholics in England and Wales. It features a prominent baldacchino over the high altar and houses the remains of important figures like the first two Archbishops of Westminster. The cathedral is also distinguished by having over 100 varieties of marble from around the world. The cathedral's official dedication is to the Most Precious Blood of Jesus Christ, reflected in its Latin inscription above the entrance. It stands apart from England's medieval Gothic cathedrals with its neo-Byzantine architectural style and has a rich interior decoration completed over many years since its opening. Westminster Cathedral is wheelchair accessible and offers onsite services and mass throughout the week. It is a popular tourist attraction known for its unique architectural style that contrasts with the more commonly known Westminster Abbey nearby, which is Anglican and entirely different. In summary, Westminster Cathedral is a magnificent Roman Catholic cathedral notable for its Byzantine architecture, marble interiors, religious significance, and status as the largest Catholic church in England and Wales.