Pistohl, translated by Bristol, is an old Spanish gold coin, equivalent to 10 franc. /kloc-in the 0/7th century, due to the increase of exchanges between European countries and the change of the original French standard currency, Groeju, to Pitiju, the face value was halved. Large coins from other countries, such as Frohring, dukat and pistols, are widely used in France, among which Pistohl uses more. In addition, The Three Musketeers mentioned that there is also a double Pistohl, whose value is doubled. Later, Louis XIII began to cast a large number of gold Louis, each gold Louis is equivalent to 20 francs (Livermore). However, with the inflow of silver produced in the United States, the price of silver fell. On the eve of the Revolution, one Louis was exchanged for 24 francs. At this time, the circulation of Pistohl gradually decreased, but it was still used together with Egyptian and King Louis. 1795, France unified the monetary system into francs and Louis (Louis was called Napoleon for short at the beginning of 19 century), abolished the circulation of Pistohl, and set the value of Louis at 20 francs. In the novels of Hugo, Balzac and Mo Bosang, we can still see the circulation of Louis, but it gradually became a simple counting unit in the later period, and ceased to be used in the early 20th century.