The peso was first produced in 1810, when it replaced the Spanish real. At that time, the peso was pegged to the real at an exchange rate of 8 reals to 1 peso. During the rest of the 19th century, Colombian currency included gold and silver coins in varying denominations, up to a 10 peso gold coin. Modern Colombian coins are minted, like those of other currencies, using primarily copper and nickel alloys.