St. Paul S Cathedral - St Paul's Cathedral, Is The Anglican Cathedral On Ludgate Hill, In The City Of London, And The Seat Of The Bishop Of London. The Present Building Dates From The 17th Century And Is Generally Reckoned To Be London's Fifth St Paul's Cathedral, Although The Number Is Higher If Every Major Medieval Reconstruction Is Counted As A New Cathedral. The Cathedral Sits On The Edge Of London's Oldest Region, The City, Which Originated As A Roman Trading Post Along The Edge Of The River Thames. The Cathedral Is One Of London's Most Visited Sites. Photo