The 800s decade ran from January 1, 800, to December 31, 809.
Year 800 (DCCC) was a leap year starting on Wednesday of the Julian calendar, the 800th year of the Common Era (CE) and Anno Domini (AD) designations, the 800th year of the 1st millennium, the 100th and last year of the 8th century, and the 1st year of the 800s decade. It was around this time that the Anno Domini calendar era became the prevalent method in Europe for naming years, so from this time on, the years began to be known as 800 and onwards.
The 790s decade ran from January 1, 790, to December 31, 799.
The 780s decade ran from January 1, 780, to December 31, 789.
Year 816 (DCCCXVI) was a leap year starting on Tuesday of the Julian calendar, the 816th year of the Common Era (CE) and Anno Domini (AD) designations, the 816th year of the 1st millennium, the 16th year of the 9th century, and the 7th year of the 810s decade.
Year 787 (DCCLXXXVII) was a common year starting on Monday of the Julian calendar. The denomination 787 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 774 (DCCLXXIV) was a common year starting on Saturday of the Julian calendar. The denomination 774 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 808 (DCCCVIII) was a leap year starting on Saturday of the Julian calendar, the 808th year of the Common Era (CE) and Anno Domini (AD) designations, the 808th year of the 1st millennium, the 8th year of the 9th century, and the 9th year of the 800s decade.
Year 762 (DCCLXII) was a common year starting on Friday of the Julian calendar, the 762nd year of the Common Era (CE) and Anno Domini (AD) designations, the 762nd year of the 1st millennium, the 62nd year of the 8th century, and the 3rd year of the 760s decade. The denomination 762 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 775 (DCCLXXV) was a common year starting on Sunday of the Julian calendar. The denomination 775 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 780 (DCCLXXX) was a leap year starting on Saturday of the Julian calendar, the 780th year of the Common Era (CE) and Anno Domini (AD) designations, the 780th year of the 1st millennium, the 80th year of the 8th century, and the 1st year of the 780s decade. The denomination 780 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 782 (DCCLXXXII) was a common year starting on Tuesday of the Julian calendar, the 782nd year of the Common Era (CE) and Anno Domini (AD) designations, the 782nd year of the 1st millennium, the 82nd year of the 8th century, and the 3rd year of the 780s decade. The denomination 782 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 792 (DCCXCII) was a leap year starting on Sunday of the Julian calendar, the 792nd year of the Common Era (CE) and Anno Domini (AD) designations, the 792nd year of the 1st millennium, the 92nd year of the 8th century, and the 3rd year of the 790s decade. The denomination 792 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 796 (DCCXCVI) was a leap year starting on Friday of the Julian calendar, the 796th year of the Common Era (CE) and Anno Domini (AD) designations, the 796th year of the 1st millennium, the 96th year of the 8th century, and the 7th year of the 790s decade. The denomination 796 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 797 (DCCXCVII) was a common year starting on Sunday of the Julian calendar. The denomination 797 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 798 (DCCXCVIII) was a common year starting on Monday of the Julian calendar, the 798th year of the Common Era (CE) and Anno Domini (AD) designations, the 798th year of the 1st millennium, the 98th year of the 8th century, and the 9th year of the 790s decade. The denomination 798 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 799 (DCCXCIX) was a common year starting on Tuesday of the Julian calendar. The denomination 799 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 582 (DLXXXII) was a common year starting on Thursday of the Julian calendar. The denomination 582 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.
Constantine VI was Byzantine emperor from 780 to 797. The only child of Emperor Leo IV, Constantine was named co-emperor with him at the age of five in 776 and succeeded him as sole Emperor in 780, aged nine. His mother Irene exercised control over him as regent until 790, assisted by her chief minister Staurakios. The regency ended when Constantine reached maturity, but Irene sought to remain an active participant in the government. After a brief interval of sole rule Constantine named his mother empress in 792, making her his official colleague.
Eardwulf was king of Northumbria from 796 to 806, when he was deposed and went into exile. He may have had a second reign from 808 until perhaps 811 or 830. Northumbria in the last years of the eighth century was the scene of dynastic strife between several noble families: in 790, king Æthelred I attempted to have Eardwulf assassinated. Eardwulf's survival may have been viewed as a sign of divine favour. A group of nobles conspired to assassinate Æthelred in April 796 and he was succeeded by Osbald: Osbald's reign lasted only twenty-seven days before he was deposed and Eardwulf became king on 14 May 796.
