<P> In modern times, the Bangladeshi taka is considered a legacy of the historical taka because Bengal was the stronghold of the currency . It was inscribed in numerous languages across different regions, including in Sanskrit, Arabic, Persian, Hindustani, Bengali, Nepali, Tibetan and Mandarin . </P> <P> Taka is a corruption of Tanka, which is derived from' Tamgha' or' Tamga' meaning seal or stamp in old Turkic . Turkish was the language of the Delhi Sultans . </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> <P> The taka was traditionally equal to one silver rupee in Islamic Bengal . In 1338, Ibn Battuta noticed that the silver taka was the most popular currency in the region instead of the Islamic dinar . In 1415, members of Admiral Zheng He's entourage also noticed the dominance of the taka . The currency was the most important symbol of sovereignty for the Sultan of Bengal . The Sultanate of Bengal established at least 27 mints in provincial capitals across the kingdom . </P>

The silver coin used as currency during delhi sultanate