The tower of St. Anne's Limehouse was a beacon to sailors and for them was the signal that they had reached their destination. Limehouse was a resting place for sailors because of its position to the north of the bend in the river around the Isle of Dogs. It became famous due to it's Chinese settlers, opium dens and no-go areas. It has inspired songs, including Limehouse Blues, and Arthur Conan Doyle sent Sherlock Holmes there in disguise. The privilege of flying the White Ensign continuously was granted by Queen Anne. The sphere is aluminium and helped sailors to identify it. This is of course one of the Hawksmoor churches commissioned by Queen Anne and and carries many mysteries and sinister stories in itself.