Tower of London, Raven. Eight ravens are kept at the Tower of London. Their wings are clipped so they can't fly away. Legend has it that failing to have Ravens reside at the Tower will cause it to crumble and a terrible disaster shall befall England.
All the birds of Jeru come, Sing a song of martyrdom. Every cage and every tree, Set the birds of Jeru free. If the King among you dies, Lift him up and bring him here, To claim his troth to every ear.