__NOTOC__ Year 643 ( DCXLIII) was a

common year starting on Wednesday A common year starting on Wednesday is any non-leap year (a year with 365 days) that begins on Wednesday, 1 January, and ends on Wednesday, 31 December. Its dominical letter hence is E. The most recent year of such kind was 2014, and the next one ...

(link will display the full calendar) of the

Julian calendar The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandr ...

. The denomination 643 for this year has been used since the early medieval period, when the

Anno Domini The terms (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars. The term is Medieval Latin and means 'in the year of the Lord', but is often presented using "our Lord" instead of "the Lord", ...

calendar era A calendar era is the period of time elapsed since one ''epoch'' of a calendar and, if it exists, before the next one. For example, it is the year as per the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic ...

became the prevalent method in Europe for naming years.

Events

By place

Byzantine Empire

* Emperor

Constans II Constans II ( grc-gre, Κώνστας, Kōnstas; 7 November 630 – 15 July 668), nicknamed "the Bearded" ( la, Pogonatus; grc-gre, ὁ Πωγωνᾶτος, ho Pōgōnãtos), was the Eastern Roman emperor from 641 to 668. Constans was the last ...

recognises

Theodore Rshtuni Theodore Rshtuni, also spelled Theodoros Ṛštuni (, ; AD 590–655 or 656), equated with Pasagnathes (Πασαγνάθης), the "''patrikios'' of the Armenians" from the chronicle of Theophanes the Confessor,Armenia Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ''Ox ...

, after his successful campaign against the

Muslim Muslims ( ar, المسلمون, , ) are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Ab