Persian rugs are among the earliest varieties of oriental rugs; the earliest one that has been discovered is estimated to have been made in the 4th (or 5th) Century B.C. These rugs have gained notoriety and recognition for centuries due to their recognizable patterns and warm, rich colors. Genuine Persian rugs are handcrafted, and their creation can take weeks or even months with the assistance of several people. However, the final products are unique, endearing, and robust rugs. Currently, wool or cotton is used to make the majority of Persian rugs, but older rugs were occasionally made with silk. Despite producing a beautiful appearance, using silk made these rugs more expensive and less sturdy.