Called 'A Series of Surprises' because of its unique architecture, mosaics and marble decorations. Westminster Cathedral was begun in 1895. Its origins go back much further, being designed in the early Christian Byzantine style by the Victorian architect, John Francis Bentley. The Cathedral was conceived to be built quickly with inside decorations added as funds became available. The structure was completed in 1903. Brick built the vast domed interior has the widest and highest nave in England and is decorated with mosaics plus 125 varieties of marble.