| 41. | In the north-east corner stands a donjon, a high, square tower.
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| 42. | The donjon was at the centre of this change in castle architecture in the 12th century.
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| 43. | This castle was first established in 1286 as a wooden donjon but was rebuilt in stone.
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| 44. | On 24 July 1680, a terrible thunderstorm hit Heusden, and lightning struck the donjon.
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| 45. | A ruined mediaeval donjon was preserved.
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| 46. | Becoming known as Athlone Castle, this 12-sided donjon dates from the 13th century.
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| 47. | The central keep or Donjon was built in local brown stone in the 14th-century.
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| 48. | Upper floors can be reached through stairs running along the walls inside and outside the donjon.
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| 49. | Only twelve castles have a " donjon " that is considered " original ".
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| 50. | Though on intimate terms with the young Longueville to the donjon at the ch�teau de Vincennes.
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