| 31. | Shoghi Effendi called the door on the octagon after him.
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| 32. | The Poveglia octagon is one of four that still survive.
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| 33. | In 1999 a further extension, known as the Octagon was built.
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| 34. | An ambulatory surrounds the font and outer walls form a larger octagon.
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| 35. | This octagon is surrounded by an ambulatory with complex vaulting.
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| 36. | The balcony is in the shape of half an octagon.
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| 37. | Princes Street that The Octagon began to gain any prominence.
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| 38. | It included the Octagon, the emperor's bedchamber.
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| 39. | The tower is a true octagon with a diameter of.
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| 40. | The ground plan of the balcony shows the half of an octagon.
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