<P> The imperial tanka ( also called Sultani Tanka ) was officially introduced by the monetary reforms of Muhammad bin Tughluq , the emperor of the Delhi Sultanate , in 1329 . It was modeled as representative money , a concept pioneered as paper money by the Mongols in China and Persia . The tanka was minted in copper and brass . Its value was exchanged with gold and silver reserves in the imperial treasury . The currency was introduced due to the shortage of metals . Over time , the tanka was minted in silver . However , chaos followed its launch in the 14th century , leading to the collapse of the Tughluq dynasty . The Tughluqs were succeeded by numerous regional states , notably the Bengal Sultanate , the Bahmani Sultanate and the Gujarat Sultanate . These kingdoms continued to mint the new currency in the name of their own rulers . Even much later under the early modern Mughal Empire , regional currencies were still referred to as tanka / tangka / taka . </P>
<P> The imperial tanka ( also called Sultani Tanka ) was officially introduced by the monetary reforms of Muhammad bin Tughluq , the emperor of the Delhi Sultanate , in 1329 . It was modeled as representative money , a concept pioneered as paper money by the Mongols in China and Persia . The tanka was minted in copper and brass . Its value was exchanged with gold and silver reserves in the imperial treasury . The currency was introduced due to the shortage of metals . Over time , the tanka was minted in silver . However , chaos followed its launch in the 14th century , leading to the collapse of the Tughluq dynasty . The Tughluqs were succeeded by numerous regional states , notably the Bengal Sultanate , the Bahmani Sultanate and the Gujarat Sultanate . These kingdoms continued to mint the new currency in the name of their own rulers . Even much later under the early modern Mughal Empire , regional currencies were still referred to as tanka / tangka / taka . </P>
the silver coin used as currency during delhi sultanate
the silver coin used as currency during delhi sultanate
tanka
tanka