Year 668 (DCLXVIII) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 668 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Millennium: 1st millennium
668 in various calendars
Gregorian calendar668
Ab urbe condita1421
Armenian calendar117
Assyrian calendar5418
Balinese saka calendar589–590
Bengali calendar75
Berber calendar1618
Buddhist calendar1212
Burmese calendar30
Byzantine calendar6176–6177
Chinese calendar丁卯(Fire Rabbit)
3364 or 3304
    — to —
戊辰年 (Earth Dragon)
3365 or 3305
Coptic calendar384–385
Discordian calendar1834
Ethiopian calendar660–661
Hebrew calendar4428–4429
Hindu calendars
 - Vikram Samvat724–725
 - Shaka Samvat589–590
 - Kali Yuga3768–3769
Holocene calendar10668
Iranian calendar46–47
Islamic calendar47–48
Japanese calendarN/A
Javanese calendar559–560
Julian calendar668
Korean calendar3001
Minguo calendar1244 before ROC
Nanakshahi calendar−800
Seleucid era979/980 AG
Thai solar calendar1210–1211
Tibetan calendar阴火兔年
(female Fire-Rabbit)
794 or 413 or −359
    — to —
(male Earth-Dragon)
795 or 414 or −358


By place

Byzantine Empire


Arabian Empire


By topic





  1. ^ Bury, p. 306
  2. ^ Bury, p. 307
  3. ^ Kashiwahara Y., Sonoda K. "Shapers of Japanese Buddhism", Kosei (1994)
  4. ^ Walsh, "A New Dictionary of Saints", p. 127
600 (number)

600 (six hundred) is the natural number following 599 and preceding 601.

Constans II

Constans II (Greek: Κώνστας Β', Kōnstas II; Latin: Heraclius Constantinus Augustus or Flavius Constantinus Augustus; 7 November 630 – 15 September 668), also called Constantine the Bearded (Κωνσταντῖνος ὁ Πωγωνάτος Kōnstantinos ho Pogonatos), was emperor of the Byzantine Empire from 641 to 668. He was the last emperor to serve as consul, in 642. Constans is a nickname given to the Emperor, who had been baptized Herakleios and reigned officially as Constantine. The nickname established itself in Byzantine texts and has become standard in modern historiography.

German submarine U-668

German submarine U-668 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 11 October 1941 at the Howaldtswerke yard at Hamburg, launched on 5 October 1942, and commissioned on 16 November 1942 under the command of Oberleutnant zur See Wolfgang von Eickstedt.

Attached to 5th U-boat Flotilla based at Kiel, U-668 completed her training period on 31 March 1944 and was assigned to front-line service.


Goguryeo (고구려; 高句麗; [ko.ɡu.ɾjʌ], 37 BCE–668 CE), also called Goryeo (고려; 高麗; [ko.ɾjʌ]), was a Korean kingdom located in the northern and central parts of the Korean Peninsula and the southern and central parts of Manchuria. Along with Baekje and Silla, Goguryeo was one of the Three Kingdoms of Korea. It was an active participant in the power struggle for control of the Korean peninsula and was also associated with the foreign affairs of neighboring polities in China and Japan.

The Samguk sagi, a 12th-century text from Goryeo, indicates that Goguryeo was founded in 37 BCE by Jumong (Hangul: 주몽; Hanja: 朱蒙), a prince from Buyeo, who was enthroned as Dongmyeong.

Goguryeo was one of the great powers in East Asia, until its defeat by a Silla–Tang alliance in 668 after prolonged exhaustion and internal strife caused by the death of Yeon Gaesomun. After its fall, its territory was divided among the states of Later Silla and Balhae.

The name Goryeo (alternately spelled Koryŏ), a shortened form of Goguryeo (Koguryŏ), was adopted as the official name in the 5th century, and is the origin of the English name "Korea".

ISO 668

ISO 668 - Series 1 freight containers — Classification, dimensions and ratings is an ISO international standard which classifies intermodal freight shipping containers and standardises their size and weight specifications. Introduced in 1968, ISO 668 regulates both external and internal dimensions of containers, as well as the minimum door opening size, where applicable. It also specifies the associated gross weight ratings, and requirements for load transfer areas in the base structures of containers, since amendment 1 of 2005.The current edition of the standard is version E of 2013, which integrates version E from 1995 with its two amendments of 2005.

Kosmos 668

Kosmos 668 (Russian: Космос 668 meaning Cosmos 668), also known as DS-P1-Yu No.74, was a Soviet satellite which was launched in 1974 as part of the Dnepropetrovsk Sputnik programme. It was a 400-kilogram (880 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.The launch of Kosmos 668 took place from Site 133/1 at the Plesetsk Cosmodrome, and used a Kosmos-2I 63SM carrier rocket. It occurred at 12:00 UTC on 25 July 1974, and resulted in the satellite successfully reaching low Earth orbit. Upon reaching orbit, the satellite was assigned its Kosmos designation, and received the International Designator 1974-058A. The North American Aerospace Defense Command assigned it the catalogue number 07385.

Kosmos 668 was the seventy-first of seventy nine DS-P1-Yu satellites to be launched, and the sixty-fourth of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of 266 kilometres (165 mi), an apogee of 475 kilometres (295 mi), 70.9 degrees of inclination, and an orbital period of 92 minutes. It remained in orbit until it decayed and reentered the atmosphere on 21 February 1975.

Later Silla

Later Silla (668–935, Hangul: 후신라; Hanja: 後新羅; RR: Husilla, Korean pronunciation: [huː.ɕil.la]) or Unified Silla (Hangul: 통일신라; Hanja: 統一新羅, Korean pronunciation: [tʰoːŋ.il.ɕil.la]) is the name often applied to the Korean kingdom of Silla, one of the Three Kingdoms of Korea, after it conquered Baekje and Goguryeo in the 7th century, unifying the central and southern regions of the Korean peninsula. Later Silla was a prosperous and wealthy country, and its metropolitan capital of Seorabeol (modern name Gyeongju) was the fourth-largest city in the world at the time. During its heyday, the country contested with Balhae, a Goguryeo–Mohe kingdom, to the north for supremacy in the region. Throughout its existence, Later Silla was plagued by intrigue and political turmoil, mainly by the rebel groups in conquered Baekje and Goguryeo territories, leading to the Later Three Kingdoms period in the late 9th century.

Despite its political instability, Later Silla's culture and arts flourished. Through close ties maintained with the Tang dynasty, Buddhism and Confucianism became the principal philosophical ideologies of the elite as well as the mainstays of the period's architecture and fine arts. Its last king, Gyeongsun, ruled over the state in name only and submitted to Wang Geon of the emerging Goryeo kingdom in 935, bringing the Silla dynasty to an end.

Although traditionally considered the first unified Korean state, modern Korean historians argue that the subsequent Goryeo kingdom was in fact the first truly unified state of the Korean nation.

List of secondary highways in Cochrane District

This is a list of secondary highways in Cochrane District, most of which serve as logging roads, mine and dam access roads, or provide access to isolated and sparsely populated areas in the Cochrane District of northeastern Ontario.

List of state highways in Maryland shorter than one mile (2–699)

The following is a list of state highways in Maryland shorter than one mile (1.6 km) in length with route numbers between 2 and 699. Most of these highways act as service roads, old alignments of more prominent highways, or connectors between one or more highways. Many of these highways are unsigned and have multiple segments with the same number. Several of these highways have their own articles; those highways are summarized here and a link is provided to the main article. This list does not include highways where at least one highway of that number is at least one mile in length. All highways at least one mile in length have their own article. The highways shorter than one mile with the same number are covered in the main article for the highway.

Lynch v. Donnelly

Lynch v. Donnelly, 465 U.S. 668 (1984), was a United States Supreme Court case challenging the legality of Christmas decorations on town property.

NGC 668

NGC 668 is a spiral galaxy located 200 million light-years away in the constellation Andromeda. It was discovered by astronomer Édouard Stephan on December 4, 1880 and is a member of Abell 262.

No. 668 Squadron RAF

No. 668 Squadron RAF was a glider squadron of the Royal Air Force active during the Second World War.

Saskatchewan Highway 396

Highway 396 is a highway in the Canadian province of Saskatchewan. It runs from Highway 668 to Highway 16 near Guernsey. Highway 396 is about 3.0 km (1.9 mi) long.Highway 396 takes over directly from Highway 668 3.0 km (1.9 mi) southwest of Highway 16.

Saskatchewan Highway 668

Highway 668 is a highway in the Canadian province of Saskatchewan. It runs from Highway 365 near Watrous until it becomes Highway 396. Highway 668 is about 34 km (21 mi.) long.

Highway 668 also intersects Highway 761.

Saskatchewan Highway 761

Highway 761 is a highway in the Canadian province of Saskatchewan. It runs from Highway 668 to Highway 6 near Leroy. Highway 777 is about 88 km (55 mi) long.Highway 777 passes through town of Lanigan; it also has a spur that is also signed as Highway 777 that links it to Highway 20 in Drake.

Three Kingdoms of Korea

The concept of the Three Kingdoms of Korea (Hangul: 삼국시대; Hanja: 三國時代) refers to the three kingdoms of Baekje (백제, 百濟), Silla (신라, 新羅) and Goguryeo (고구려, 高句麗). Goguryeo was later known as Goryeo (고려, 高麗), from which the modern name Korea is derived. The Three Kingdoms period was defined as being from 57 BC to 668 AD (but there existed about 78 tribal states in the southern region of Korean peninsula and relatively big states like Okjeo, Buyeo, and Dongye in its northern part and Manchuria).

The three kingdoms occupied the entire Korean Peninsula and most of Manchuria, located in present-day China and Russia . The kingdoms of Baekje and Silla dominated the southern half of the Korean Peninsula and Tamna, whereas Goguryeo controlled the Liaodong Peninsula, Manchuria and the northern half of the Korean Peninsula. Baekje and Goguryeo shared founding myths and originated from Buyeo.In the 7th century, allied with China under the Tang dynasty, Silla unified the Korean Peninsula for the first time in Korean history, forming a united Korean national identity for the first time. After the fall of Baekje and Goguryeo, the Tang dynasty established a short-lived military government to administer parts of the Korean peninsula. However, as a result of the Silla–Tang War (≈670–676), Silla forces expelled the Protectorate armies from the peninsula in 676. The following period is known as the Unified Silla or Later Silla (668–935).

Subsequently, Go of Balhae, a former Goguryeo general, founded Balhae in the former territory of Goguryeo after defeating the Tang dynasty at the Battle of Tianmenling.

The predecessor period, before the development of the full-fledged kingdoms, is sometimes called Proto–Three Kingdoms period.

Main primary sources for this period include Samguk sagi and Samguk yusa in Korea, and the "Eastern Barbarians" section (東夷傳) from the Book of Wei (魏書) of the Records of the Three Kingdoms in China.

USS Clarence K. Bronson

USS Clarence K. Bronson (DD-668) was a Fletcher-class destroyer of the United States Navy, named for naval aviator Lieutenant (junior grade) Clarence K. Bronson (1888–1916).

Clarence K. Bronson was launched 18 April 1943 by the Federal Shipbuilding and Dry Dock Co., Kearny, N.J., sponsored by Mrs. W. P. Richardson; and commissioned 11 June 1943, Commander W. S. Veeder in command.

USS Yokes (APD-69)

USS Yokes (APD-69), ex-DE-668, was a United States Navy high-speed transport in commission from 1944 to 1946.

Virginia State Route 668

State Route 668 (SR 668) in the U.S. state of Virginia is a secondary route designation applied to multiple discontinuous road segments among the many counties. The list below describes the sections in each county that are designated SR 668.

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