725
Encyclopedia
Year 725 was a common year starting on Monday
Common year starting on Monday
This is the calendar for any common year starting on Monday, January 1 . Examples: Gregorian year 1990, 2001, 2007 and 2018or Julian year 1918 ....

 (link will display the full calendar) of the Julian calendar
Julian calendar
The Julian calendar began in 45 BC as a reform of the Roman calendar by Julius Caesar. It was chosen after consultation with the astronomer Sosigenes of Alexandria and was probably designed to approximate the tropical year .The Julian calendar has a regular year of 365 days divided into 12 months...

. The denomination 725 for this year has been used since the early medieval period, when the Anno Domini
Anno Domini
and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

 calendar era
Calendar era
A calendar era is the year numbering system used by a calendar. For example, the Gregorian calendar numbers its years in the Western Christian era . The instant, date, or year from which time is marked is called the epoch of the era...

 became the prevalent method in Europe for naming years.

Europe

  • Bede
    Bede
    Bede , also referred to as Saint Bede or the Venerable Bede , was a monk at the Northumbrian monastery of Saint Peter at Monkwearmouth, today part of Sunderland, England, and of its companion monastery, Saint Paul's, in modern Jarrow , both in the Kingdom of Northumbria...

     writes On the reckoning of time (De temporum ratione) explaining how to calculate medieval Easter
    Computus
    Computus is the calculation of the date of Easter in the Christian calendar. The name has been used for this procedure since the early Middle Ages, as it was one of the most important computations of the age....

    .

Asia

  • In China
    China
    Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

    , the Tang Dynasty
    Tang Dynasty
    The Tang Dynasty was an imperial dynasty of China preceded by the Sui Dynasty and followed by the Five Dynasties and Ten Kingdoms Period. It was founded by the Li family, who seized power during the decline and collapse of the Sui Empire...

     Buddhist monk, astronomer, and mechanical engineer Yi Xing
    Yi Xing
    Yi Xing , born Zhang Sui , was a Chinese astronomer, mathematician, mechanical engineer,and Buddhist monk of the Tang Dynasty...

     applies a clockwork escapement
    Escapement
    In mechanical watches and clocks, an escapement is a device that transfers energy to the timekeeping element and enables counting the number of oscillations of the timekeeping element...

     mechanism to provide rotating motion to his astronomical armillary sphere
    Armillary sphere
    An armillary sphere is a model of objects in the sky , consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic...

    .


Deaths

  • April 23 – Wihtred, king of Kent
    Kent
    Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

  • Tonyukuk
    Tonyukuk
    Tonyukuk Tonyukuk Tonyukuk (Old Turkic: , Bilge Tuňuquq, died c. 724 AD, (暾欲穀/暾欲谷, Pinyin: tūnyùgǔ, personal name: Ashide Yuanzhen 阿史德元珍, āshǐdé yuánzhēn, a-shih-te yüan-chen) was the yabgu and commander-in-chief of four Göktürk khagans, the best known of whom is Bilge Khan. He played a major role...

    , chancellor of Kutluk Khan, Kapagan Khan and Bilge Khan
    Bilge Khan
    Bilge Qaghan was khagan of the Second Eastern Turkic Khaganate...

     in Turkish Empire
    Göktürks
    The Göktürks or Kök Türks, were a nomadic confederation of peoples in medieval Inner Asia. Known in Chinese sources as 突厥 , the Göktürks under the leadership of Bumin Qaghan The Göktürks or Kök Türks, (Old Turkic: Türük or Kök Türük or Türük; Celestial Turks) were a nomadic confederation of...

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