The Emperors of China strove to keep knowledge of sericulture secret to maintain the Chinese monopoly.

Despite being isolated from the surviving portions of the Roman Empire, Syagrius managed to maintain a degree of Roman authority in northern Gaul for twenty years, and his state survived longer than the Western Empire itself, the last Emperors being overthrown or killed in 476 and 480.

Until then, as Germany had become too powerful for isolation, his policy was to maintain the Three Emperors League.

The Ar-Ulric and the two Arch-Lectors of the Sigmarite faith, as well as the Grand Theogonist ( currently Volkmar the Grim ), all maintain a vote in the election of the Emperors.

Like his father, Francesco was often despotic, but while Cosimo had known how to maintain Florentine independence, Francesco acted more like a vassal of his father-in-law, the emperor, and subsequent Holy Roman Emperors.

Emperors considered themselves responsible to God for the spiritual health of their subjects, and thus they had a duty to maintain orthodoxy.

Roman Emperors and Roman males of the senatorial class wore clothes with a purple band to denote their class so the reference to purple may be to an aristocratic heritage.

Emperors of Rome often met their end in this way, as did many of the Muslim Shia Imams hundreds of years later.

Throughout its history, the dynasty, as well as being Emperors of the French, held various other titles and territories including ; their ancestral nation the Kingdom of Italy, Kingdom of Spain, Kingdom of Westphalia, Kingdom of Holland and the Kingdom of Naples.

During the Yuan dynasty, Halal methods of slaughtering animals and preparing food was banned and forbidden by the Mongol Emperors, starting with Genghis Khan who banned Muslims and Jews from slaughtering their animals their own way, and making them follow the Mongol method.

It brought to an end the first phase of the power struggle between the Papacy and the Holy Roman Emperors and has been interpreted as containing within itself the germ of nation-based sovereignty that would one day be confirmed in the Treaty of Westphalia ( 1648 ); in part this was an unforeseen result of strategic maneuvering between the Church and the European sovereigns over political control within their domains.

Previous Holy Roman Emperors had thought it their right, granted by God, to name the Pope, as well as other Church officials, such as bishops.

The Emperors spent most of their time in public appearances.

The Tetrarchic Emperors were more or less sovereign in their own lands, and they travelled with their own imperial courts, administrators, secretaries, and armies.

Emperors in the forty years preceding Diocletian's reign had not managed these duties so effectively, and their output in attested rescripts is low.

* List of the Emperors, accompanied with the regents and shoguns during their reign and a genealogical tree of the imperial family

Some empires, such as the Holy Roman Empire and the Russian Empire, derived their office from the authority of the Roman Emperors ( translatio imperii ).

The importance and meaning of coronation ceremonies and regalia also varied within the tradition: for instance Holy Roman Emperors could only be crowned emperor by the pope, which meant the coronation ceremony usually took place in Rome, often several years after these emperors had ascended to the throne ( as " king ") in their home country.

The first Latin Emperors of Constantinople on the other hand had to be present in the newly conquered capital of their empire, because that was the only place where they could be granted to become emperor.

Early Roman Emperors avoided any type of ceremony or regalia different from what was already usual for republican offices in the Roman Republic: the most intrusive change had been changing the color of their robe to purple.

The Ottomans insisted on this elevated style while refusing to recognize the Holy Roman Emperors or the Russian tsars because of their rival claims of the Roman crown.

Though their influence declined, the clan remained close advisors to the succeeding Emperors.

Factiones and claques could vent their spleen on each other, and occasionally on Emperors.

Despite this naval defeat, it was on the ground that this war would be won, Napoleon inflicted the Austrian and Russian Empires one of their greatest defeats at Austerlitz ( also known as the " Battle of the Three Emperors " on 2 December 1805 ), destroying the Third Coalition.

When the Bishop of Constantinople was exiled from his See, he wrote three letters to those he considered the most important Bishops of the West seeking to obtain their support with the Emperors: he wrote one letter to the Bishop of Rome, the second to the Bishop of Milan and the third to the Bishop of Aquileia, precisely, Chromatius ( Ep.

* Tamora Pierce's Protector of the Small series shows the Conté royal family marrying into an Imperial line based on the Emperors of Japan ; they preserve their claim to divine lineage by adding the "- kami " suffix to their names ( e. g., Princess Shinkokami ).

The Habsburg Holy Roman Emperors had long been interested in mercantilist policies, but the vast and decentralized nature of their empire made implementing such notions difficult.

In Central Mexico, the Aztec Emperors built many palaces in the capital of their empire, Tenochtitlan ( modern day Mexico City ), some of which may still be seen.

The Holy Roman Emperors of Ottonian Dynasty, when they came to the throne, believed they should have the power to appoint the pope.

During the protracted Ethiopian-Adal War ( 1529 – 1559 ), Imam Ahmad ibn Ibrihim al-Ghazi defeated several Ethiopian Emperors and embarked on a conquest referred to as the Futuh Al-Habash (" Conquest of Abyssinia "), which brought three-quarters of Christian Abyssinia under the power of the Muslim Adal Sultanate.

Chaos ensued, leading to a year of brutal civil war known as the Year of the Four Emperors, during which the four most influential generals in the Roman Empire — Galba, Otho, Vitellius and Vespasian — successively vied for imperial power.

There were no such dictatorships after the beginning of the 2nd century BC, and later dictators such as Sulla and the Roman Emperors exercised power much more personally and arbitrarily.

It was used to describe the unlimited power and authority of the Pharaohs of Egypt, employed in the Byzantine court as a title of nobility, used by the rulers of Byzantine vassal states, and adopted as a title of the Byzantine Emperors.

Emperors have been known to come into conflict with the reigning shogun from time to time ; a notable example is the Hōgen Rebellion of 1156, in which former Emperor Sutoku attempted to seize power from the then current Emperor Go-Shirakawa, both of whom were supported by different clans of samurai.

As abdicated Emperors took over power by exercising insei (, cloistered rule ) at the end of 11th century, then followed by the rise of warrior class, the Fujiwara gradually lost its control over mainstream politics.

The family reached the peak of its power under Fujiwara no Michinaga ( 966-1027 ), a longtime kampaku who was the grandfather of three emperors, the father of six empresses or imperial consorts, and the grandfather of seven additional imperial consorts ; it is no exaggeration to say that it was Michinaga who ruled Japan during this period, not the titular Emperors.

During the protracted Ethiopian-Adal War ( 1529 – 1559 ), Imam Ahmad ibn Ibrihim al-Ghazi defeated several Ethiopian Emperors and embarked on a conquest referred to as the Futuh Al-Habash (" Conquest of Abyssinia "), which brought three-quarters of Christian Abyssinia under the power of the Muslim Adal Sultanate.

Severus seized power after the death of Emperor Pertinax in 193 during the Year of the Five Emperors.

The dynasty was founded by the Roman general Septimius Severus, who rose to power as the victor of the civil war through 193, known as the Year of the Five Emperors.

* The Concordat of Worms resolves the Investiture Controversy, thus bringing to an end the first phase of the power struggle between the Papacy and the Holy Roman Emperors.

However, the Visconti family were able to seize power ( signoria ) in Milan, based on their " Ghibelline " friendship with the German Emperors.

However, when Go-Toba, a grandson of Go-Shirakawa and Chiten at the time, planned to overthrow Kamakura Bakufu and failed ( Jōkyū War ), the power of the court, particularly that of retired Emperors was markedly cut down by the shogunate.

His forced conversions or evictions carried out in the midst of the Thirty Years ' War, which with the later general success of the Protestants therefore had greatly negative consequences for Habsburg control of the Holy Roman Empire itself, while these campaigns within the Habsburg hereditary lands were largely successful in religiously purifying his demesnes, leaving the Austrian Emperors thereafter with much greater control within their hereditary power base — although Hungary was never successfully re-Catholicized — but one much reduced in population and economic might while less vigorous and weakened as a nation-state.

In the four protectorates, the French formally left the local rulers in power, who were the Emperors of Vietnam, Kings of Cambodia, and Kings of Luang Prabang, but in fact gathered all powers in their hands, the local rulers acting only as figureheads.

The Emperors of Eastern Jin had limited power, with most of it concentrated in the royal family's hands, whilst military power was mostly wielded by non-royals.

The campaign came to a brief halt with the death of emperor Nero in 68, launching Vespasian's bid for the imperial power during the Year of the Four Emperors.

In practice, however, the power of the emperor varied between different Emperors and different dynasties.

Court eunuchs had a significant role in the power structure, as Emperors often relied on a few of them as confidants, which gave them access to many court documents.

Yet over the next two centuries, Popes and Emperors squabbled over a variety of issues, and the German rulers routinely treated the Papal States as part of their realms on those occasions when they projected power into Italy.

Much of the best work in ceramics, textiles and other techniques was produced over a long period by the various Imperial factories or workshops, which as well as being used by the court was distributed internally and abroad on a huge scale to demonstrate the wealth and power of the Emperors.

The signs of the imperial power of the Nguyen Emperors were the Great Imperial Seal and the Sword.