As in the History of the India Banaras is known since regveda about 1500 year 2000 year BC and also a period of Ramayana and Mahabharat come to know identical reference about the fame of Banarasi Sharee and Fabrics as known Hiranya Vastra (Putamber Vastra).
In the ancient time Banaras was famous for the weaving of cotton saree and dress materials, but slowly switched over to silk weaving, during the Moghal period around 14th century weaving of brocades with intricate designs using gold & Silver threads was the speciality of Banaras.
Brocade refer to those textiles where in patterns are created in weaving by transfixing or thrusting the pattern-thread between the warp. In regular weaving the weft thread passes over and under the warp thread regularly. But when brocade designs in gold, silver silk or cotton threads are to be woven, special threads are transfixed in between by skipping the passage of the regular weft over a certain number of warp threads (depending upon the pattern) and by regularising the skipping by means of pre-arranged heddles for each type of patterning. There may be several sets of heddles so arranged that on different occasions, they raise and depress irregular number of threads in turn, as required by the exigencies of the pattern.
Zari-brocades-When gold and silver threads are use along with or without silk-threads, thrust either as special weft or warp to create glittering raised or-namentation. We have the Zari brocade kind of fabrics. When we talk of gold or silver threads. It is to be under stood that the gold,threads are actually only silver threads with gold polish and that these threads are obtained by closely winding extremely fine gold or silver wire around a silk thread.