Many regions of the world have their own traditions and designs when it comes to carpets, and each have a unique appeal. Authentic hand-knotted carpets were made in Persia, India, Africa, China, and many other regions. A hand-knotted rug is made by knotting the pile into the foundation, making it strong and durable. A well cared for hand-knotted rug could last as long as 80 years or even more. This also accounts for their expense.