The existing reverence for Centrality must have been still further stimulated toward the close of the second century B.C., when the Han Emperor Wu Ti ordered the dynastic color changed to yellow -- which symbolized the Center among the traditional Five Directions -- and took 5 as the dynastic number, believing that he would thus place himself, his imperial family, and the nation under the most auspicious influences.

Emperor Wu consolidated and extended the Chinese empire by pushing back the Xiongnu into the steppes of modern Inner Mongolia, wresting from them the modern areas of Gansu, Ningxia and Qinghai.

The dynasty continued to flourish under Empress Wu Zetian, the only empress regnant in Chinese history, and reached its zenith during the reign of Emperor Xuanzong, who oversaw an empire that stretched from the Pacific to the Aral Sea with at least 50 million people.

Emperor Wu of Han ( r. 141 BC-87 BC ) went to war with the Dayuan for this reason, since the Dayuan were hording a massive amount of tall, strong, Central Asian bred horses in the Hellenized – Greek region of Fergana ( established slightly earlier by Alexander the Great ).

For more than two thousand years, since the time of Emperor Wu of Han, the month containing the winter solstice has almost always been the 11th month.

The Emperor Wu of the Western Han dynasty introduced reforms that have governed the Chinese calendar ever since.

As Confucianism became the preferred philosophy of later Chinese dynasties, starting from the Emperor Wu of Han, Mohism and other non-Confucian philosophical schools of thought were suppressed.

* 141 BC – Liu Che, posthumously known as Emperor Wu of Han, assumes the throne over the Han Dynasty of China.

He is regarded as the father of Chinese historiography for his highly praised work, Records of the Grand Historian, a " Jizhuanti "- style general history of China, covering more than two thousand years from the Yellow Emperor to Emperor Wu of Han.

His father, Sima Tan, served as the Prefect of the Grand Scribes of Emperor Wu of Han ( Emperor " Han Wudi ").

Emperor Wu of Han sent Zhang Qian to explore the west world and to discover other confederates against Xiongnu.

* Emperor Wu of Han, considered one of the greatest emperors throughout the History of China

* Emperor Wu of Northern Zhou

Emperor Emperor Wu of Liu Song | Wu Di ( 420 – 422 )

* Emperor Wu of Han (" Martial Emperor ") starts to rule.

* The Chinese under Emperor Wu of Han besiege and capture Kokand of Dayuan in the Hellenistic Ferghana Valley, during a 2 year war with the Yuezhi.

* Peasant revolts under Emperor Wu of Han.

Emperor Emperor Wu of Liang | Wu Di ( 502 – 549 )

* 1402 – Zhu Di, better known by his era name as the Yongle Emperor, assumes the throne over the Ming Dynasty of China.

Once Zhu Di deposed Jianwen and became crowned as Yongle Emperor ( r. 1403-1424 ), Zheng He continued serving in his court as a Eunuch Grand Director ( 太監, tàijiàn ).

* Ping Di, Emperor of Han Dynasty China, r. 1 BC – 5 AD

Emperor Jianwen is either lost or killed and Zhu Di is crowned as Emperor Hongwu.

* Xian Wen Di, Retired Emperor of Northern Wei, is murdered by Empress Feng.

* Xian Wen Di, Chinese Emperor of Northern Wei ( b. 454 )

* January – Some Chinese fear for the life of the young, ailing Emperor Ping Di as the planet Mars disappears behind the moon this month.

* Chend Di, Emperor of Han Dynasty China, r. 32 – 7 BC

* Ai Di, Emperor of Han Dynasty China, r. 7 – 1 BC

* Ping Di, Emperor of Han Dynasty China, r. 1 BC – 5 AD

* Emperor He Di dies after a 17-year reign in which court eunuchs and the emperor's in-laws have regained influence.

* Emperor Xiao Wen Di starts adopting a sinicization policy as well as various reforms.

* Emperor Xiao Wen Di moves the capital of Northern Wei from Datong to Luoyang.

* Emperor Xiao Wen Di of Northern Wei starts the Sinicization process by changing his clan name to the Han Chinese surname Yuan.

* Emperor Xiao Wen Di institutes an " equal-field " system of agriculture, assigning each peasant family about 19 acres ( 140 mu ) of land, of which a small portion is to be kept permanently by the farmer and his family with the rest reverting to the state upon his death of retirement.

* April 26 – Emperor Xiao Wen Di dies of starvation in his capital at Luoyang after a 27-year reign in which he has Sinicized his tribal relatives ( Tuoba clan ).

* Emperor Xiao Wen Di of Northern Wei builds the Shaolin Monastery ( Henan ) for the monk Batuo.

Emperor Shun Di is forced to abandon the throne and Qi Gao Di becomes the first ruler of Southern Qi.

Emperor He Di, age 14, is put to death.

Ambrose immediately issued a fiery protest to the Emperor.

In the period immediately after 1000, two figures appeared to lead Western Christendom, the Pope and the Holy Roman Emperor.

Once Emperor, Domitian immediately sought to attain his long delayed military glory.

The Senate nonetheless rejoiced at the death of Domitian, and immediately following Nerva's accession as Emperor, passed damnatio memoriae on his memory: his coins and statues were melted, his arches were torn down and his name was erased from all public records.

The newly designated Mughal Subedar of the province immediately sent a letter to the British authorities at Fort St George demanding that the English at Madras acknowledge the overlordship of the Mughal Emperor.

Several cities such as Cologne became Imperial Free Cities, which did not depend on princes or bishops, but were immediately subject to the Emperor.

The new Emperor was immediately forced to attend to the Second Arab siege of Constantinople, which commenced in August of the same year.

Most of her life, she was known as Maria Feodorovna (), the name which she took when she converted to Orthodoxy immediately before her 1866 marriage to the future Emperor Alexander III.

After his recent opponent could regain the power, the Emperor immediately reacted and began the preparations for the expedition against Poland.

When Pope Liberius was banished by Emperor Constantius II to Berea in 354, Damasus was archdeacon of the Roman church and followed Liberius into exile, though he immediately returned to Rome.

Honorius immediately came into conflict with Emperor Henry V over imperial claims in Italy.

Upon his accession as pope, Gregory immediately appealed to the Byzantine Emperor Leo III to moderate his position on the iconoclastic controversy.

But, as neither the King of France nor the Holy Roman Emperor were satisfied with merely effecting the purposes of the Pope, the latter found it necessary to enter into an arrangement with the Venetians to defend himself from those who immediately before had been his allies against them.

In 1628, immediately after becoming Mughal Emperor, Shah Jahan's forces were ambushed by Sikh rebels, the Emperor organized an assault, which caused almost all the Sikhs, including Guru Hargobind and his mercenaries to flee.

In June 251, Decius was killed in battle with the Goths ; immediately following this Trebonianus Gallus became Emperor.

His nephew Richwin came with a message and greeting from the Emperor Otto II as the sun rose, and immediately upon this, while the clergy sang the Litany, St. Ulrich died.

Consalvi immediately left for France, where he was able to negotiate the Concordat of 1801 with the Emperor Napoleon.

Michael was immediately proclaimed Emperor, still wearing the chains from the prison on his legs.

Although Dutch potters did not immediately imitate Chinese porcelain, they began to after the death of the Wanli Emperor in 1620, when the supply to Europe was interrupted.

The power of the Hōjō remained unchallenged until 1324, when Emperor Go-Daigo orchestrated a plot to overthrow them, but the plot was discovered almost immediately and foiled.

As Maximilian was the son of Emperor Frederick III, all Flanders was immediately seized by King Louis XI of France.

Li Si also ordered that two carts containing rotten fish be carried immediately before and after the wagon of the Emperor.

Machiavelli gives a negative example in Emperor Maximilian I ; Maximilian, who was secretive, never consulted others, but once he ordered his plans and met dissent, he immediately changed them.