A silver coin, the akce was the chief monetary unit of the Ottoman Empire. Three akces were equal to one para. One-hundred and twenty akces equaled one kuru. Later the kuru became the main unit of account, replacing the akce. In 1843, the silver kuru was joined by the gold lira in a bimetallic system.Sevket Pamuk, A Monetary History of the Ottoman Empire, Cambridge University Press, 2000, ISBN 0-521-44197-8
The Suleiman Mosque in Istanbul is said to have cost 59 million akce when it was constructed in the 1550s. This amount is said to have equaled 700,000 ducats in gold (probably Venetian).