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Obol (coin)

Obol (coin) 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 Obol (coin) rather than just read about it. In short: The obol or obolus (Ancient Greek: ὀβολός obolós, also ὀβελός obelós, ὀβελλός obellós, ὀδελός odelós; lit. 'nail; metal spit'; Latin: obolus) was a form of ancient Greek currency and weight. Currency Obols were used from early times.

Obol (coin) — main illustration
Obol (coin) — illustration

Key takeaways

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

Reference excerpt

The obol or obolus (Ancient Greek: ὀβολός obolós, also ὀβελός obelós, ὀβελλός obellós, ὀδελός odelós; lit. 'nail; metal spit'; Latin: obolus) was a form of ancient Greek currency and weight.

Currency Obols were used from early times. According to Plutarch they were originally spits of copper or bronze traded by weight, while six obols make a drachma or a handful, since that was as many as the hand could grasp. Heraklides of Pontus (died c. 310 BC) is cited as having mentioned the obols of Heraion and also gives the etymology of obolos (the name of the coin) from obelos (the word for "spit, spike, nail"). Similarly, the historian Ephorus in his equally lost work On Inventions (mid 4th century BC) is said to have mentioned the obols of Heraion. Excavations at Argos discovered several dozen of these early obols, dated well before 800 BC; they are now displayed at the Numismatic Museum of Athens. Archaeologists today describe the iron spits as "utensil-money" since excavated hoards indicate that during the Late Geometric period they were exchanged in handfuls (drachmae) of six spits; they were not used for manufacturing artifacts as metallurgical analyses suggest, but they were most likely used as token-money.

In Classical Athens, obols were traded as silver coins. Six obols made up the drachma. There were also coins worth two obols ("diobol") and three obols ("triobol"). By the 5th century BC, variations on obols expanded to include coins worth one and one-half ("trihemiobol") obols and half obols ("hemiobol"). The 4th century BC diversified further with some minted obols worth as little as one-eighth obol, equivalent to a single copper. Each obol was divisible into eight coppers ("chalcus", χαλκός, chalkós). In some other cities the obol was instead divided into twelve chalci. During this era, an obol purchased a kantharos and chous (3 L or 100 US fl oz) of wine. Three obols was a standard rate for prostitutes. In the 4th century BC, bronze obols were first minted, which were generally larger due to bronze being a less precious metal than silver, thus needing a larger amount to produce an equivalent coin. This larger size made bronze coins fairly popular, as their small, silver predecessors were much easier to lose track of. Obols had a variety of designs stamped into them based on the region in which they were produced. Athenian obols were typically emblazoned with the face of Athena on one side, and an owl on the reverse. Other regions in Greece had various designs, but the Athenian design was popular enough that the majority of obols discovered by archaeologists today bear the owl design. Diobols and triobols were differentiated from standard obols through slight variations to the owl design, changing the way the bird faced and how its wings were positioned for easily identifiable currency.

Funerary use

The deceased were buried with an obol placed in the mouth of the corpse, so that—once a deceased's shade reached Hades—they would be able to pay Charon for passage across the river Acheron or Styx. Legend had it that those without enough wealth or whose friends refused to follow proper burial rites were forced to wander the banks of the river for one hundred years until they were allowed to cross it.

Weight The obol or obolus was also a measurement of Greek, Roman, and apothecaries' weight. In ancient Greece, it was generally reckoned as 1⁄6 drachma (c. 0.72 grams or 11 grains). Under Roman rule, it was defined as 1⁄48 Roman ounce or about 0.57 g (9 gr). The apothecaries' system also reckoned the obol or obolus as 1⁄48 ounce or 1⁄2 scruple. While 0.72 grams was the weight of a standard Greek obol, the actual amount of silver that went into making the currency could vary from region to region. Obols in Athens were typically near the 0.72-gram standard, while Corinth was documented having 0.42-gram obols.

Literary use The obolus, along with the mirror, was a symbol of new schismatic heretics in the short stories "The Zahir" and "The Theologians" by Argentine author Jorge Luis Borges. In the story's discussion of the circularity of time, eternity, and the transmigration of the soul through several bodies the author uses a quotation of Luke 12:59, mistranslated as "no one will be released from prison until he has paid the last obolus" since Luke calls the coin a lepton (a somewhat smaller denomination) rather than an obolus.

See also The currency of the United States of the Ionian Islands, called the obol The British halfpenny, also formerly known as the obol Obelisks (ὀβελίσκοι, obelískoi), which also derived from the bars or the critical mark

References

2. Vol. I of the Loeb Classical Library edition, 1914 Plutarch, Lycurgus, 9

External links

A History of Measures: The Use of Obeliskoi (archived) How we came to know about the iron obols, the antecedents of the drachma

Illustrations

Obol (coin) illustration
Obol (coin) illustration
Obol (coin) illustration
Obol (coin) illustration
Obol (coin) illustration

Worked examples

Example 1 — a first encounter with Obol (coin)

Start with the simplest possible case. Write down what Obol (coin) 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 Obol (coin) 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 Obol (coin) 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 Obol (coin)

In research
Obol (coin) 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 Obol (coin) 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
Obol (coin) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ancient Greek units of measurement, Coins of ancient Greece, Numismatics, so understanding it makes those chapters shorter.
In everyday life
Look for Obol (coin) 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 Obol (coin) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Obol (coin) 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 Obol (coin) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Obol (coin) in simple terms?

The obol or obolus (Ancient Greek: ὀβολός obolós, also ὀβελός obelós, ὀβελλός obellós, ὀδελός odelós; lit. 'nail; metal spit'; Latin: obolus) was a form of ancient Greek currency and weight. Currency Obols were used from early times.

Why does Obol (coin) 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 Obol (coin)?

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 Obol (coin).

Tags

  • Ancient Greek units of measurement
  • Coins of ancient Greece
  • Numismatics

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