These beams, known as la foret (the forest) because of their density, formed the cross-shaped roof that ran the length of the central part of the cathedral.
这些因其密度而被著称为 la foret（森林）的梁，组成了横跨大教堂中心部分的十字形屋顶。
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The fire, which had started at the base of the 93-metre spire at about 6: 40 pm on Monday, spread through the cathedral's roof, made up of hundreds of oak beams, some dating back to the 13th century.