At Christmastide 1497 a great fire broke out in the king's private chambers, destroying a large portion of the palace. The Milanese ambassador, Raimondo Soncino, witnessed the blaze, and estimated the damage at 60,000 ducats, in modern money about $10 million or approximately £7 million. The fire lasted three hours and tore through the rest of the palace, causing panic and hundreds to flee. Hammerbeam roofs of the Middle Ages were a structural necessity as much as they were pretty architecture as they kept the heavy timbered roofs from caving in; they were the carpenter's equivalent of the stone vaulting found in Gothic cathedrals of the Middle Ages because as in famous examples, like Westminster Hall, they allowed the architect greater ability to achieve higher heights with thinner walls and evenly distributed the lateral weight. In as large a fire as described by Soncino the English oak beams of the great hall, a centrepiece of a royal Christmas, would have stood no chance of remaining upright and intact. They would have been engulfed in flames in the high temperatures well exceeding 270 °C. Much of the tapestry work of earlier ages was burnt to cinders, and losses included crown jewels and much of the royal wardrobe including a large amount of cloth of gold, at this time a luxury item only wearable by royalty and in the case of Sheen Palace it was a feature of the bedding.