All Hallows-by-the-Tower, London.
Wikipaedia: "It only narrowly survived the Great Fire of London in 1666 and owes its survival to Admiral William Penn, father of William Penn of Pennsylvania fame, who had his men from a nearby naval yard demolish the surrounding buildings to create firebreaks. During the Great Fire, Samuel Pepys climbed the church's spire to watch the progress of the blaze and what he described as "the saddest sight of desolation"."

And now the saddest sight of architectural ugliness.