Knot tying can be dated back thousands of years. The first material was probably a plant fiber. Today we would use leather strips, ribbon, wire, cotton string or rope.
Knots have been used for a variety of purposes through the ages. The Incas of Peru used knots for written communication. The type of knot, and the position on a colored cord, would all convey a special message. Knots have been used as decoration for jewelry, fringe on window dressing, wall hangings and art, like traditional Celtic knot designs.
Sailors and fishermen have many uses for knots, from anchor lines, to mooring ships, securing sails and fashioning nets.