Hieron II king of Syracuse

Syracuse, Italy

Syracuse is a historic city in Sicily, the capital of the province of Syracuse. The city is notable for its rich Greek history, culture, amphitheatres, architecture, and as the birthplace of the preeminent mathematician and engineer Archimedes. This 2,700-year-old city played a key role in...

 from 270 to 215 BC, was the illegitimate son of a Syracusan noble, Hierocles, who claimed descent from Gelo

Gelo

Gelo , son of Deinomenes, was a 5th century BC ruler of Gela and Syracuse and first of the Deinomenid rulers.- Early life :...

n. He was a former general of Pyrrhus of Epirus

Pyrrhus of Epirus

Pyrrhus or Pyrrhos was a Greek general and statesman of the Hellenistic era. He was king of the Greek tribe of Molossians, of the royal Aeacid house , and later he became king of Epirus and Macedon . He was one of the strongest opponents of early Rome...

 and an important figure of the First Punic War

First Punic War

The First Punic War was the first of three wars fought between Ancient Carthage and the Roman Republic. For 23 years, the two powers struggled for supremacy in the western Mediterranean Sea, primarily on the Mediterranean island of Sicily and its surrounding waters but also to a lesser extent in...

.

On the departure of Pyrrhus from Sicily

Sicily

Sicily is a region of Italy, and is the largest island in the Mediterranean Sea. Along with the surrounding minor islands, it constitutes an autonomous region of Italy, the Regione Autonoma Siciliana Sicily has a rich and unique culture, especially with regard to the arts, music, literature,...

 (275 BC) the Syracusan army and citizens appointed him commander of the troops. He strengthened his position by marrying the daughter of Leptines, the leading citizen. In the meantime, the Mamertines

Mamertines

The Mamertines were mercenaries of Italian origin who had been hired from their home in Campania by Agathocles, the king of Syracuse. After Syracuse lost the Third Sicilian War, the city of Messana was ceded to Carthage in 307 BC. When Agathocles died in 289 BC he left many of his mercenaries idle...

, a body of Campania

Campania

Campania is a region in southern Italy. The region has a population of around 5.8 million people, making it the second-most-populous region of Italy; its total area of 13,590 km² makes it the most densely populated region in the country...

n mercenaries who had been employed by Agathocles

Agathocles

Agathocles , , was tyrant of Syracuse and king of Sicily .-Biography:...

, had seized the stronghold of Messana, and proceeded in harassing the Syracusans. They were finally defeated in a pitched battle near Mylae by Hieron, who was only prevented from capturing Messana by Carthaginian

Carthage

Carthage , implying it was a 'new Tyre') is a major urban centre that has existed for nearly 3,000 years on the Gulf of Tunis, developing from a Phoenician colony of the 1st millennium BC...

 interference. His grateful countrymen then made him king

King

- Centers of population :* King, Ontario, CanadaIn USA:* King, Indiana* King, North Carolina* King, Lincoln County, Wisconsin* King, Waupaca County, Wisconsin* King County, Washington- Moving-image works :Television:...

 (270).

In 264 BC he again returned to the attack, and the Mamertines called in the aid of Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

. Hieron at once joined the Punic leader Hanno

Hanno

Hanno may refer to:* Hanno, Saitama, Honshū, Japan* Hanno , a lunar crater* Hanno , the pet white elephant of Pope Leo XPeople named Hanno:*Several ancient Carthaginians, including:...

, who had recently landed in Sicily; but fighting a battle to an inconclusive outcome with the Romans led by the consul

Consul

Consul was the highest elected office of the Roman Republic and an appointive office under the Empire. The title was also used in other city states and also revived in modern states, notably in the First French Republic...

 Appius Claudius Caudex, he withdrew to Syracuse. Pressed by the Roman forces, in 263 he concluded a treaty with Rome, by which he was to rule over the south-east of Sicily and the eastern coast as far as Tauromenium.

From this time till his death in 215 BC he remained loyal to the Romans, and frequently assisted them with men and provisions during the Punic war. He kept up a powerful fleet for defensive purposes, and employed his famous kinsman Archimedes

Archimedes

Archimedes of Syracuse was a Greek mathematician, physicist, engineer, inventor, and astronomer. Although few details of his life are known, he is regarded as one of the leading scientists in classical antiquity. Among his advances in physics are the foundations of hydrostatics, statics and an...

 in the construction of those engines that, at a later date, played so important a part during the siege of Syracuse by the Romans.

According to a story told by Vitruvius

Vitruvius

Marcus Vitruvius Pollio was a Roman writer, architect and engineer, active in the 1st century BC. He is best known as the author of the multi-volume work De Architectura ....

, Hiero suspected he was being cheated by the goldsmith to whom he had supplied the gold to make a votive crown

Votive crown

A votive crown is a votive offering in the form of a crown, normally in precious metals and often adorned with jewels. Especially in the Early Middle Ages, they are of a special form, designed to be suspended by chains at an altar, shrine or image...

 for a temple. He asked Archimedes to find out if all the gold had been used, as had been agreed. Archimedes, on discovering the principle of displacement

Displacement (fluid)

In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place. The volume of the fluid displaced can then be measured, as in the illustration, and from this the volume of the immersed object can be deduced .An object that sinks...

 needed to measure the density

Density

The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ . In some cases , density is also defined as its weight per unit volume; although, this quantity is more properly called specific weight...

 of the crown is said to have shouted "eureka, eureka!"

Eureka (word)

"Eureka" is an interjection used to celebrate a discovery, a transliteration of a word attributed to Archimedes.-Etymology:The word comes from ancient Greek εὕρηκα heúrēka "I have found ", which is the 1st person singular perfect indicative active of the verb heuriskō "I find"...

 while running naked through Syracuse. Vitruvius concludes this story by stating that Archimedes' method successfully detected the goldsmith's fraud; he had taken some of the gold and substituted silver instead.

A picture of the prosperity of Syracuse during his rule is given in the sixteenth idyll of Theocritus

Theocritus

Theocritus , the creator of ancient Greek bucolic poetry, flourished in the 3rd century BC.-Life:Little is known of Theocritus beyond what can be inferred from his writings. We must, however, handle these with some caution, since some of the poems commonly attributed to him have little claim to...

, his favourite poet.

In The Prince

The Prince

The Prince is a political treatise by the Italian diplomat, historian and political theorist Niccolò Machiavelli. From correspondence a version appears to have been distributed in 1513, using a Latin title, De Principatibus . But the printed version was not published until 1532, five years after...

(VI), Machiavelli cites Hiero as an exceptionally virtuous man and a rare example of someone who rose to princehood from private station.