Tetradrachm in the context of "Ancient drachma"

In Greek mythology, a little owl (Athene noctua) traditionally represents or accompanies Athena, the virgin goddess of wisdom, or Minerva, her syncretic incarnation in Roman mythology. Because of such association, the bird—often referred to as the "owl of Athena" or the "owl of Minerva"—has been used as a symbol of knowledge, wisdom, perspicacity and erudition throughout the Western world.

Coinage of the Ptolemaic kingdom was struck in Phoenician weight, also known as Ptolemaic weight (about 14.2 grams) which was the weight of a Ptolemaic tetradrachm. This standard, which was not used elsewhere in the Hellenistic world, was smaller than the dominant Attic weight (about 17.28 grams) which was the weight of standard Hellenistic tetradrachm. Consequentially, Ptolemaic coins are smaller than other Hellenistic coinage. In terms of art, the coins, which were made of silver, followed the example set by contemporary Greek currencies, with dynastic figures being typically portrayed. The Ptolemaic coin making process often resulted in a central depression, similar to what can be found on Seleucid coinage.

The Ptolemaic dynasty introduced standard coinage to Egypt, where pre-existing native dynasties made only very limited use of coins. Egyptian gold stater was the first coin ever minted in ancient Egypt around 360 BC during the reign of pharaoh Teos of the 30th Dynasty. These coins were used to pay salaries of Greek mercenaries in his service.

A mural crown (Latin: corona muralis) is a crown or headpiece representing city walls, towers, or fortresses. In classical antiquity, it was an emblem of tutelary deities who watched over a city, and among the Romans a military decoration. Later the mural crown developed into a symbol of European heraldry, mostly for cities and towns, and in the 19th and 20th centuries was used in some republican heraldry.

The Eagle of Zeus (Ancient Greek: ἀετός Διός, romanized: Aetos Dios) was one of the chief attributes and personifications of Zeus, the head of the Olympian pantheon.

Cleomenes III (Ancient Greek: Κλεομένης) was one of the two kings of Sparta from 235 to 222 BC. He was a member of the Agiad dynasty and succeeded his father, Leonidas II. He is known for his attempts to reform the Spartan state.

From 229 to 222 BC, Cleomenes waged war against the Achaean League under Aratus of Sicyon. After being defeated by the Macedonians in the Battle of Sellasia in 222 BC, he fled to Ptolemaic Egypt. After a failed revolt in 219 BC, he committed suicide.

Attic weight, or the Attic standard, also known as Euboic standard, was one of the main monetary standards in ancient Greece. As a result of its use in the coinage of the Athenian empire and the empire of Alexander the Great, it was the dominant weight standard for coinage issued in the Eastern Mediterranean from the fifth century BC until the introduction of the Roman denarius to the region in the late first century BC.

The Attic weight was based on a drachma of 4.31 grams, but in practice the main denomination was the tetradrachm or four-drachma coin, which weighed approximately 17.26 g in silver. For larger sums, the units of account were the mina (100 drachmae or 435 g), and the talent (6,000 drachmae or 26.1 kg).

Bar Kokhba revolt coinage were coins issued by the Judaean rebel state, headed by Simon Bar Kokhba, during the Bar Kokhba revolt against the Roman Empire of 132–135 CE.

During the revolt, large quantities of coins were issued in silver and copper with rebellious inscriptions, all being overstruck over foreign (mostly Roman) coins, when a file was used to remove the designs of the original coins, such as the portrait of the Roman Emperor. The undercoin can clearly be seen on some of the silver coins because they were not filed down so as not to lose the value of the silver. On the bronze coins it is very difficult to see the underlying coin because they were filed down before they were over-struck. In rare instances, the coin cracked when it was overstruck.