Saudi King Abdulaziz ruled Saudi Arabia from 1953 to 1964. During this period, the country's coinage developed significantly. Until then, the money was minted in London, but in 1956 the Saudi Arabian mint was opened in Jeddah. In the 1950s, the Saudi Arabian mint minted silver and gold coins as well as paper money. Silver coins included 1/2, 1, 2, 5, and 10 riyals, as well as 1/20, 1/10, 1/5, and 1 riyal silver pennies. Gold coins included 1/2, 1, 2, 5 and 10 riyals. Paper money included 1, 5, 10, 20, 50, 100 and 500 riyal notes. In the 1960s, further developments were made in the Saudi Arabian coinage. The use of copper and nickel for minting coins began, and the first polymer banknotes appeared. The coinage of King Abdulaziz of Saudi Arabia contributed significantly to the development of the Saudi Arabian economy. The introduction of modern coinage technologies made it possible to significantly improve the quality and security of Saudi Arabian money.