The 800s decade ran from January 1, 800, to December 31, 809.
The 820s decade ran from January 1, 820, to December 31, 829.
The 860s decade ran from January 1, 860, to December 31, 869.
The 870s decade ran from January 1, 870, to December 31, 879.
The 710s decade ran from January 1, 710, to December 31, 719.
The 700s decade ran from January 1, 700, to December 31, 709.
The 630s decade ran from January 1, 630, to December 31, 639.
The 640s decade ran from January 1, 640, to December 31, 649.
The 670s decade ran from January 1, 670, to December 31, 679.
The 680s decade ran from January 1, 680, to December 31, 689.
The 690s decade ran from January 1, 690, to December 31, 699.
The 940s decade ran from January 1, 940, to December 31, 949.
Year 632 (DCXXXII) was a leap year starting on Wednesday of the Julian calendar. The denomination 632 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.
Year 633 (DCXXXIII) was a common year starting on Friday of the Julian calendar. The denomination 633 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.
Year 637 (DCXXXVII) was a common year starting on Wednesday of the Julian calendar. The denomination 637 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.
Year 740 (DCCXL) was a leap year starting on Friday of the Julian calendar, the 740th year of the Common Era (CE) and Anno Domini (AD) designations, the 740th year of the 1st millennium, the 40th year of the 8th century, and the 1st year of the 740s decade. The denomination 740 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.
Year 715 (DCCXV) was a common year starting on Tuesday of the Julian calendar. The denomination 715 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.
Year 717 (DCCXVII) was a common year starting on Friday of the Julian calendar. The denomination 717 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.
Abu Ayyub al-Ansari — born Khalid ibn Zayd ibn Kulayb ibn Tha'laba in Yathrib — was from the tribe of Banu Najjar, was a close companion and the standard-bearer of the Islamic prophet Muhammad. Abu Ayyub was one of the Ansar of the early Islamic history, those who supported Muhammad after the hijra (migration) to Medina in 622. The patronym Abu Ayyub, means father (abu) of Ayyub. Abu Ayyub died of illness during the First Arab Siege of Constantinople.
The first Arab siege of Constantinople in 674–678 was a major conflict of the Arab–Byzantine wars, and the first culmination of the Umayyad Caliphate's expansionist strategy towards the Byzantine Empire, led by Caliph Mu'awiya I. Mu'awiya, who had emerged in 661 as the ruler of the Muslim Arab empire following a civil war, renewed aggressive warfare against Byzantium after a lapse of some years and hoped to deliver a lethal blow by capturing the Byzantine capital, Constantinople.
