In Europe, Anatolian rugs were frequently depicted in Renaissance paintings, often in a context of dignity, prestige and luxury. Political contacts and trade intensified between Western Europe and the Islamic world after the 13th century AD. When direct trade was established with the Ottoman Empire during the 14th century, all kinds of carpets were at first indiscriminately given the trade name of "Turkish" carpets, regardless of their actual place of manufacture. Since the late nineteenth century, oriental rugs have been subject to art historic and scientific interest in the Western world. The richness and cultural diversity of rug weaving were gradually better understood. More recently, also flat woven carpets (Kilim, Soumak, Cicim, Zili) have attracted the interest of collectors and scientists.