The Gold Coin of the Sun that Counted a King's Ransom
A gold coin created to proclaim the brilliance of royal authority. In time, this coin also became the unit for counting the ransom of a captured king. We trace the two scenes of glory and defeat reflected by this particular gold coin.

A Mark Proclaiming the Splendor of Royal Power
On the gold coin, a small sun rests above the shield. This is the Écu d'or au soleil, the gold écu with a sun. First issued by Louis XI in 1475, this gold coin features a design of a sun placed above a shield with three fleurs-de-lis surmounted by a crown. This was a mark proclaiming the splendor of restored royal power.
His father, Louis XI, left behind a centralized and well-funded crown. His son, Charles VIII, marched his army into Italy in 1494. The coins counted for this campaign were precisely those gold coins of the sun created by his father. The basic design of this gold coin continued to be struck until the reign of François I and remained the standard for French gold coinage until the Louis d'or replaced it in 1640.
The Battle of Pavia and Two Million Écus
The gold coin that had been a symbol of glory would eventually be used to count the cost of defeat. On February 24, 1525, France was defeated at the Battle of Pavia. King François I was taken prisoner and held captive in Madrid. It is said that the king wrote to his mother that all was lost, save for his honor and his life.
Eventually, the king's two young sons were sent to Spain as hostages in his place. Then, in 1529, a peace treaty arranged by two women set the price for the princes' return: two million écus. This was the king's ransom, counted in those same gold coins of the sun.
A Palace Built in the Shadow of Defeat
Behind the scenes of this ransom payment, the same king was amassing astonishing wealth. In the space of about fifteen years, François I built or renovated as many as seven châteaux. One of these, Fontainebleau, began its transformation from a medieval hunting lodge into a Renaissance palace around 1528.
The king's emblem, the salamander, was carved on the walls, and painters were invited from Italy. Leonardo da Vinci was also invited, and one of his masterpieces made its way to the country. The funds for this splendor came from the same royal purse that had paid the debt of that defeat. This brilliant culture was supported by the burdens of the common people in the form of taxes, the sale of offices, and public bonds.
In time, the contents of that purse, though no one was at war, would be quietly diluted by silver from across the sea.
More in Reading a coin

The Fate of Gold, Divided by Its Use
The Toyotomi faction converted the gold and silver left by Hideyoshi into military power, while Tokugawa Ieyasu established a monetary system valid throughout the country. This is the story of how gold and silver from the same era met completely opposite ends depending on how they were used.

The Value of the Yen as Defined by the 20 Yen Gold Coin
The old 20 yen gold coin was the highest denomination established by the New Coinage Act. The value of this coin, which equated one yen to 1.5 grams of pure gold, was halved in the 30th year of Meiji. Behind this was the war indemnity left in London.

The Fate of Paper Inscribed with "Time Flies"
In the center, "FUGIO" (time flies) and a sundial; below it, "MIND YOUR BUSINESS." Printed to finance the War of Independence, the Continental currency, contrary to its motto, lost its value and left an idiom in the English language.
If you would like to read on
Everything in these pieces comes from the material itself.