Wren Cathedral

St Paul's Cathedral, designed by Christopher Wren, is on Ludgate Hill, in the City of London and the seat of the Bishop of London (nb to be a city in England, there must be a Bishop). The present building dates from the 17th century, and is generally reckoned to be London's fourth St Paul's Cathedral, although the number is higher if every major medieval reconstruction is counted as a new cathedral. This photograph taken from the Bankside Power Station; the Millenium Bridge crosses the Thames.