The English penny (plural "pence"), originally a coin of 1.3 to 1.5 grams (0.042 to 0.048 troy ounces; 0.046 to 0.053 ounces) pure silver, was introduced c. 785 by King Offa of Mercia. These coins were similar in size and weight to the continental deniers of the period and to the Anglo-Saxon sceats which had preceded it. Throughout the period of the Kingdom of England, from its beginnings in the 9th century, the penny was produced in silver. Pennies of the same nominal value, 1⁄240 of a pound sterling, were in circulation continuously until the creation of the Kingdom of Great Britain in 1707.