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. In the Ottoman Empire, successive currency reforms had reduced the value of the Ottoman piastre by the late 19th century so as to be worth about two pence (2d) sterling. Hence the name piastre referred to two distinct kinds of coins in two distinct parts of the world, both of which had descended from the Spanish pieces of eight.