Kuruş, also gurush, ersh, gersh, grush, grosha, and grosi, are all names for currency denominations in and around the territories formerly part of the Ottoman Empire. The variation in the name stems from the different languages it is used in and the different transcriptions into the Latin alphabet. In European languages, the kuruş was known as the piastre.
Achaemenid version of the Croeseid, minted in Lydia, under the rule of Cyrus the Great (Old Persian: 𐎤𐎢𐎽𐎢𐏁 Kūruš) to Darius I (Old Persian: 𐎭𐎠𐎼𐎹𐎺𐎢𐏁 Dārayavaʰuš), circa 545–520 BC. It only weighs 8.06 grams, compared to the standard 10.7 grams of the original Croeseid minted by King Croesus of Lydia, which was the world's first gold coin.
The piastre or piaster is any of a number of units of currency. The term originates from the Italian for "thin metal plate". The name was applied to Spanish and Hispanic American pieces of eight, or pesos, by Venetian traders in the Levant in the 16th century.
50 Egyptian Piasters
A banknote of five dollars/cinq piastres from Lower Canada, 1839