The French 20 Francs gold coin, also known as the Napoleon, is one of the most famous European gold coins minted in the 19th century. It typically features an image of either Napoleon Bonaparte, other French monarchs, or symbolic depictions of the French Republic, depending on the time period. Struck mostly between 1803 and the late 19th century, it has become a coveted item for collectors and investors alike.

Key details:

1. Composition and Weight: It is made of 90% pure gold with the remaining 10% alloyed with copper for durability. Each coin weighs approximately 6.45 grams, with a gold content of 5.8 grams.

2. Design:

   • The obverse varies by era but often features a portrait, such as Napoleon I, Napoleon III, or a depiction of the French Republic’s symbols.
   • The reverse often includes the iconic Gallic rooster (coq gaulois) or the "Liberty, Equality, Fraternity" motto, reinforcing France’s revolutionary ideals.

3. Minting Periods:

   • Napoleon I Era (1803–1815): Coins from this period typically show Napoleon Bonaparte in profile.
   • Louis XVIII, Charles X, Louis Philippe (1815–1848): The design and portrait change with each monarch, reflecting the political shifts of the time.
   • Napoleon III Era (1852–1870): Coins from this period depict Napoleon III.
   • Third Republic (1870–1914): Coins from this period are more often marked with the rooster, symbolizing the French Republic’s ideals.

4. Value: It holds both numismatic and bullion value. The historical designs, connection to European history, and high gold purity make it popular among collectors, while investors often see it as a reliable asset for its gold content and recognizability.

The French 20 Francs gold coin embodies a rich blend of artistry, history, and intrinsic value, making it a well-regarded choice for those interested in European gold coins.