105

Millennium:	1st millennium
Centuries:	1st century – 2nd century – 3rd century
Decades:	70s 80s 90s – 100s – 110s 120s 130s
Years:	102 103 104 – 105 – 106 107 108

105 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments

Year 105 (CV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar.

Events

Emperor Trajan starts the second expedition against Dacia, he leaves with the Imperial Roman fleet from Brundusium. Permanent castrum of Legio II Adiutrix at Aquincum (modern Budapest) in Pannonia.
Legio XXX Ulpia Victrix and II Traiana Fortis are created by Trajan.
The Romans conquer Kerak from the Nabateans.
Pacorus II of Parthia dies after a 27-year reign in which he has reclaimed all of his empire. His successor Vologases III reign until 147 AD, suppressing brief rebellions as he battles against the Kushan and Alani.

Emperor He Di dies after a 17-year reign in which court eunuchs and the emperor's in-laws have regained influence. Empress Deng Sui placed her son Shang Di (barely 3 months old) on the throne, as the fifth emperor of the Chinese Eastern Han Dynasty.
Last year (17th) of yongyuan era and start of yuanxing era of the Chinese Eastern Han Dynasty.
A peace treaty is signed between Baekje and Silla in the Korean peninsula (the war started in 85).

Papermaking is refined by the Chinese eunuch Cai Lun, who receives official praise from the emperor for his methods of making paper from tree bark, hemp, remnant rags and fishnets. Paper had been made in China from the 2nd century BC, but Cai Lun's paper provides a far superior writing surface than pure silk and is much less costly to produce. Bamboo and wooden slips, will remain the usual materials for books and scrolls in most of the world for another 2 centuries, and paper will remain a Chinese secret for 500 years.
The Trajan Bridge is finished. For more than a thousand years, it is the longest arch bridge in the world to have been built, in terms of both total and span length.^[1]

Pope Alexander I succeeds Pope Evaristus as the sixth pope – traditionally.
Change of Patriarch of Constantinople from Patriarch Plutarch to Patriarch Sedecion.

↑ In terms of overall length, the bridge seems to have been surpassed by another Roman bridge across the Danube, Constantine's Bridge, a little-known structure whose length is given with 2437 m (Tudor 1974b, p. 139; Galliazzo 1994, p. 319).