Year 821 (DCCCXXI) was a common year starting on Tuesday of the Julian calendar.
The 800s decade ran from January 1, 800, to December 31, 809.
The 810s decade ran from January 1, 810, to December 31, 819.
The 820s decade ran from January 1, 820, to December 31, 829.
The 830s decade ran from January 1, 830, to December 31, 839.
The 840s decade ran from January 1, 840, to December 31, 849.
The 860s decade ran from January 1, 860, to December 31, 869.
The 780s decade ran from January 1, 780, to December 31, 789.
Year 786 (DCCLXXXVI) was a common year starting on Sunday of the Julian calendar, the 786th year of the Common Era (CE) and Anno Domini (AD) designations, the 786th year of the 1st millennium, the 86th year of the 8th century, and the 7th year of the 780s decade. The denomination 786 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 820 (DCCCXX) was a leap year starting on Sunday of the Julian calendar.
Year 831 (DCCCXXXI) was a common year starting on Sunday of the Julian calendar.
Year 832 (DCCCXXXII) was a leap year starting on Monday of the Julian calendar, the 832nd year of the Common Era (CE) and Anno Domini (AD) designations, the 832nd year of the 1st millennium, the 32nd year of the 9th century, and the 3rd year of the 830s decade.
Year 833 (DCCCXXXIII) was a common year starting on Wednesday of the Julian calendar.
Year 838 (DCCCXXXVIII) was a common year starting on Tuesday of the Julian calendar.
Year 851 (DCCCLI) was a common year starting on Thursday of the Julian calendar.
Year 866 (DCCCLXVI) was a common year starting on Tuesday of the Julian calendar.
Year 870 (DCCCLXX) was a common year starting on Sunday of the Julian calendar, the 870th year of the Common Era (CE) and Anno Domini (AD) designations, the 870th year of the 1st millennium, the 70th year of the 9th century, and the 1st year of the 870s decade.
Year 908 (CMVIII) was a leap year starting on Friday of the Julian calendar.
Year 915 (CMXV) was a common year starting on Sunday of the Julian calendar.
Ljudevit or Liudewit, often also Ljudevit Posavski, was the Duke of the Slavs in Lower Pannonia from 810 to 823. The capital of his realm was in Sisak. As the ruler of the Pannonian Slavs, he led a resistance to Frankish domination. Having lost the war against Franks, he fled to the south, presumably to Dalmatia, first to an unknown Serb župa, and then to the Croat ruler Ljudemisl, who treacherously killed him.
