Ypres (16), an old Belgian town in West Flanders, 30 m. SW. of Bruges; was at one time a great weaving centre, and famous for its diaper linen; has much fallen off, though it retains a town-hall and a cathedral, both of Gothic architecture in evidence of what it once was; it was strongly fortified once, and has been subjected to many sieges; the manufacture of thread and lace is now the most important industry.