Classical Turkish carpets from the 15th to 17th centuries, however, and in contrast to Persian carpets from that period, contain almost no walnut-brown. The dyeing of wool with the nut husk and iron mordant is appreciated for its beauty and since the beginning of the art of dyeing in Persia , and the dyeing with various parts of the tree has been practised in all the countries. In Europe , the nut husk and the barks and roots were one of the basic ingredients of dyeing in Middle Ages. In the 17th century, Colbert was developed French textile industry, classified the walnut tree among the sources of dyeing materials. This dyeing was systematically used in Europe , not only in drapery but also in all of the tapestry production centres. During the American Civil War (1861-1865) and the Turkish Independence War (1919-1922), the uniforms of the soldiers were dyed with walnut.
