Forests of the Iberian Peninsula blackberry bushes, blackthorn, hawthorn and other more or less thorny shrubs; this role can also be filled by smaller thorny plants, "los piornales", and clumps of broom. The major forests in this area are beech, oak, birch, and fir. Beech forests ("Fagus sylvatica") are found in the mountain layer of the Iberian Eurosiberian region from 800 to 1500 metres up. The soil is cool, as often chalky as siliceous (rich in silica), and nearly always acidified by rain. The layer is characterised by the beech tree. The beech tree projects a deep shadow, and so its dense foliage usually excludes
Fagus Factory one year before starting work on the Fagus factory) that architects should take account of the way the speed of modern transportation affects the way architecture is perceived. Gropius had also commented the subject in his writings. According to the historian of architecture Annemarie Jaeggi these thoughts were important in the design of Fagus: "The animated fluctuation in height, the change between horizontal structure and vertical rhythms, heavy closed volumes and light dissolved fabrics, are indicators of an approach that deliberately utilized contrasts while arriving at a harmony of opposites in a manner best expressed as a pictorial or visual