Along with the silver pennies, a few gold coins were produced, copied from a gold dinar of the Abbasid caliph Al-Mansur dated 157AH (773-4 AD). Offa Rex is centred, though the moneyer clearly had no understanding of Arabic as the Arabic text is upside down. This coin has been cited by some as proof that Offa had converted to Islam. Others argue it is more likely that the coin was produced in order to trade with Islamic Spain or as part of a yearly donation of alms to the Pope in Rome.