Wicker is not a material, but a method of weaving by which its products are also identified with this name. It is the oldest furniture making method known to history, dating as far back as 5,000 years ago. Wicker was first documented in ancient Egypt using pliable plant material, but in modern times it is made from any pliable, easily woven material. The word wicker or "wisker" is believed to be of Scandinavian origin: vika, which means "to fold" in Swedish, and vicker meaning willow. Wicker is traditionally made of material of plant origin, such as willow, rattan, reed, and bamboo, but synthetic fibers are now also used. Wicker is light yet sturdy, making it suitable for items that will be moved often like porch and patio furniture. Rushwork and wickerwork are terms used in England. A typical braiding pattern is called Wiener Geflecht, Viennese Braiding, as it was invented in 18th century Vienna and later most prominently used with the Thonet coffeehouse chair. Wicker has been documented as far back as ancient Egypt, made from indigenous "reed and swamp grasses." Middle-class families could only afford a few pieces, such as small tables. However, archaeologists working on the tombs of the wealthy pharaohs have uncovered a wider variety of wicker items, including "chests, baskets, wig boxes, and chairs". Wicker even found use in the Achaemenid Empire on the battlefield, in shields. The popularity of wicker passed from ancient Egypt and Persia to ancient Rome. Wicker baskets were used to carry items in Pompeii. Furniture was manufactured out of wicker in the Roman style. It has been proposed that the extensive use of wicker in the Iron Age (1200 BC – 400 AD in Europe) may have influenced the development of the woven patterns used in Celtic art. By the 16th and 17th centuries, wicker was "quite common" in European countries like Portugal, Spain, and England. Wicker received a boost during the Age of Exploration, when international sea traders returned from Philippines with a species of palm called rattan.