The Mecca Clock Royal Tower Hotel, with more than 800 rooms, occupies what will soon be the world's second-tallest building, a structure incorporating the world's biggest clock, with faces at least six times the size of Big Ben's, and capped by a spire topped with a golden crescent.

ECONOMIST: A Saudi tower

The Kremlin and the Tower are both royal fortresses and former arsenals.

ECONOMIST: Accessories of war

Look for cameos of the The British School of Falconry at The Equinox, a Mother of Pearl pool at The Phoenician and an iconic pink beach tower at The Royal Hawaiian.

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But a spokeswoman for the Historic Royal Palaces, which is responsible for the Tower's conservation, said it was not related to the collapse on 14 February.

BBC: Tower of London moat wall collapses

Around 3, 000 people have taken part in a guided walk to the Isle of Man's Tower of Refuge in aid of the Royal National Lifeboat Institution.

BBC: Tower of Refuge walk 'attracts thousands'

He received the gold master-keys of the Tower from the Lord Chamberlain, symbolising his responsibility for the royal palace.

BBC: Ex-Army chief 'offered Tory role'

His 80th birthday party, a grand picnic in the middle of the Champ de Mars, featured a cake depicting scenes from his life: a ten-metre tower of ganache and meringue decked in blown sugar, spun sugar and royal icing.

ECONOMIST: Gaston Len?tre