Aquila (Roman) in the context of "Roman military standards"

In ancient Roman religion and mythology, Jupiter (Latin: Iūpiter or Iuppiter, from Proto-Italic *djous "day, sky" + *patēr "father", thus "sky father" Greek: Δίας or Ζεύς), also known as Jove (nom. and gen. Iovis [ˈjɔwɪs]), is the god of the sky and thunder, and king of the gods. Jupiter was the chief deity of Roman state religion throughout the Republican and Imperial eras, until Christianity became the dominant religion of the Empire. In Roman mythology, he negotiates with Numa Pompilius, the second king of Rome, to establish principles of Roman religion such as offering, or sacrifice.

Jupiter is thought to have originated as a sky god. His identifying implement is the thunderbolt and his primary sacred animal is the eagle, which held precedence over other birds in the taking of auspices and became one of the most common symbols of the Roman army (see Aquila). The two emblems were often combined to represent the god in the form of an eagle holding in its claws a thunderbolt, frequently seen on Greek and Roman coins. As the sky god, he was a divine witness to oaths, the sacred trust on which justice and good government depend. Many of his functions were focused on the Capitoline Hill, where the citadel was located. In the Capitoline Triad, he was the central guardian of the state with Juno and Minerva. His sacred tree was the oak.

The History of Rome, perhaps originally titled Annales, and frequently referred to as Ab Urbe Condita (English: From the Founding of the City), is a monumental history of ancient Rome, written in Latin between 27 and 9 BC by the Roman historian Titus Livius, better known in English as "Livy". The work covers the period from the legends concerning the arrival of Aeneas and the refugees from the fall of Troy, to the city's founding in 753 BC, the expulsion of the Kings in 509 BC, and down to Livy's own time, during the reign of the emperor Augustus. The last event covered by Livy is the death of Drusus in 9 BC. 35 of 142 books, about a quarter of the work, are still extant. The surviving books deal with the events down to 293 BC (books 1–10), and from 219 to 166 BC (books 21–45).

The Praetorian Guard (Latin: cohortes praetoriae) was the imperial guard of the Imperial Roman army that served various roles for the Roman emperor including being a bodyguard unit, counterintelligence, crowd control and gathering military intelligence.

During the Roman Republic, the Praetorian Guards were escorts for high-ranking political officials (senators and procurators) and were bodyguards for the senior officers of the Roman legions. In 27 BC, after Rome's transition from republic to empire, the first emperor of Rome, Augustus, designated the Praetorians as his personal security escort. For three centuries, the guards of the Roman emperor were also known for their palace intrigues, by whose influence upon imperial politics the Praetorians could overthrow an emperor and then proclaim his successor as the new caesar of Rome. In AD 312, Constantine the Great disbanded the cohortes praetoriae and destroyed their barracks at the Castra Praetoria.

The coat of arms of Romania was adopted in the Romanian Parliament on 10 September 1992 as a representative coat of arms for Romania. The current coat of arms is based on the lesser coat of arms of interwar Kingdom of Romania (used between 1922 and 1947), which was designed in 1921 by the Transylvanian Hungarian heraldist József Sebestyén from Cluj, at the request of King Ferdinand I of Romania, it was redesigned by Victor Dima. As a central element, it shows a golden aquila holding a cross in its beak, and a mace and a sword in its claws. It also consists of the three colors (red, yellow, and blue) which represent the colors of the national flag. The coat of arms was augmented on 11 July 2016 to add a representation of the Steel Crown of Romania.

The double-headed eagle is an iconographic symbol originating in the Bronze Age. The earliest predecessors of the symbol can be found in the Ancient Near East (i.e., Mesopotamia and Hittite iconography) and Mycenaean Greece. Most modern uses of the emblem are directly or indirectly associated with its use by the Palaiologos dynasty of the Byzantine Empire, a use possibly derived from the Roman Imperial Aquila. High medieval iterations of the motif can be found in Islamic Spain, France, the Bulgarian Empire and the Serbian principality of Raška. From the 13th century onward, it appeared within the Islamic world in the Seljuk Sultanate of Rum and the Mamluk Sultanate, and within the Christian world in Albania, the Holy Roman Empire, Russia, and Serbia. In a few places, among them the Holy Roman Empire and Russia, the motif was further augmented to create the less prominent triple-headed eagle.