From the mid-19th to the early 20th century the finest quality rugs from Kashan were called Dabir and said to be from the workshop of Dabir. Today it is generally assumed that Dabir is an indication of fine Kerman workshop production rather than a firm attribution. However with the existence of some signed Dabir rugs it is certain that the workshop existed. The early Kashan rugs were made with Manchester wool and are softer. The change occurred in the 1930s. Kashan is a city in North Central Iran. We know that there was production of Persian Carpet at Royal workshops in the 17th and early 18th century. Many authors attribute Persian Rugs and Carpet to Kashan in the 16th century particularly of the so-called small silk Kashan Persian Carpet group.