St. Paul's Cathedral. - The most imposing building in the Metropolis, an situated in the centre of the City on a hill. It was designed and erected by Sir Christopher Wren, is 510 feet long by 225 feet wide and 2292 feet in circumference. The Cross, the length of which is 30 feet us elevated 404 feet from the foundation. The ball weighs 5,000 lbs., and the Cross 3,300 lbs.