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Piedfort

Piedfort is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Piedfort rather than just read about it. In short: A piedfort (UK: , US: ; French: pied-fort or piéfort [pjefɔʁ]) is an unusually thick coin, often exactly twice the normal weight and thickness of other coins of the same diameter and pattern. Piedforts are not normally circulated, and are only struck for presentation purposes by mint officials (such as patterns), or for collectors, dignitaries and other VIPs.

Piedfort — main illustration
Piedfort — illustration

Key takeaways

  • Piedfort belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Piedfort to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Piedfort from memory before moving on to harder problems.

Reference excerpt

A piedfort (UK: , US: ; French: pied-fort or piéfort [pjefɔʁ]) is an unusually thick coin, often exactly twice the normal weight and thickness of other coins of the same diameter and pattern. Piedforts are not normally circulated, and are only struck for presentation purposes by mint officials (such as patterns), or for collectors, dignitaries and other VIPs. Piedfort is less commonly spelled "piefort".

History

Piedfort coins were first recorded in France and Great Britain during the Middle Ages, with the first French piedforts appearing in the 12th century. The reason the coins were minted in piedfort form was probably to prevent them from being lost among normal circulating coins. Theories for the original purpose of the earliest piedfort coins are:

As patterns for administrative approval. As patterns to show engravers in different mints what an approved design should look like. As reckoning counters or jetons for mint officials, akin to a simple milestone or the beads on a more complex abacus. Later, the higher rarity of piedfort versions of a nation's coinage led to them being used as prestigious diplomatic gifts to kings, nobility, dignitaries and other VIPs. Note that coin collecting has traditionally been called "the hobby of kings". The demand for piedforts from politically influential coin collectors resulted in such routine production that a droit de pied fort, or "right of piedfort", was instituted as a formal code of rules defining who was entitled to a piedfort version of a new coin design. Edicts of such rules date back to at least 1355 in France. The first British piedforts were silver pennies minted during the reign of Edward I (1272 to 1307). Britain stopped routinely minting piedforts in 1588, but France continued to mint them for at least another 150 years before also ceasing production. The routine production of piedforts began again in France in 1890, and Britain began to produce piedforts available to the public for the first time in 1982. Since then, Britain's Royal Mint has become well-known for creating many commemorative piedfort coins. China produced piedforts for collectors in 1988.

Etymology Piedfort is a compound of the French words "pied" (foot), and "fort" (strong, great, heavy). It literally means "heavy foot", but the idiomatic meaning is "heavy weight". 18th century encyclopedic French dictionaries record it in the form of two separate words, as "pied fort" (1774):

PIED FORT, terms of currency, this word is said of a coin of gold, silver, or other metal, that is thicker than ordinary currency... The modern form of "piedfort" appears in English by 1802 in a Sotheby's auction catalog, by which time the term was already in wide use.

Misspelling Impropriety of the piefort misspelling is attested to 1917, when the error had become common enough to warrant a mention in an early numismatic jargon dictionary:

Piefort, or more properly, Piedfort, means literally any coin struck on an unusually thick planchet as a trial piece or essay. The piefort misspelling appears in English as early as 1893, where the author and citing authors give false etymologies of the word relating to the weight (not thickness) of a coin, the depiction of human legs on a coin, and a corruption of the name of the Belgian city of Liège ("Luik" in Dutch) as "Leg". The influential Krause and Mishler Standard Catalog of World Coins has used both piedfort and piefort interchangeably for at least the prior 3 decades, as of 2012. The piefort misspelling has crept back into the French language as piéfort.

See also Glossary of numismatics Pattern coin

References

Illustrations

Piedfort: Piedfort on the right
Piedfort on the right
Piedfort: Piedfort of gold écu, Louis XIII, France, 1643
Piedfort of gold écu, Louis XIII, France, 1643

Worked examples

Example 1 — a first encounter with Piedfort

Start with the simplest possible case. Write down what Piedfort claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Piedfort before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Piedfort ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Piedfort

In research
Piedfort appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Piedfort in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Piedfort is common in secondary-school and first-year university syllabi. It links to neighbouring topics Coins, so understanding it makes those chapters shorter.
In everyday life
Look for Piedfort outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Piedfort in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Piedfort means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Piedfort out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Piedfort in simple terms?

A piedfort (UK: , US: ; French: pied-fort or piéfort [pjefɔʁ]) is an unusually thick coin, often exactly twice the normal weight and thickness of other coins of the same diameter and pattern. Piedforts are not normally circulated, and are only struck for presentation purposes by mint officials (suc…

Why does Piedfort matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Piedfort?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Piedfort.

Tags

  • Coins

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