page_title: 641
hierarchical_section_title: 641
context_page_description: Year 641 was a common year starting on Monday of the Julian calendar. The denomination 641 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.
context_section_description: Year 641 (DCXLI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 641 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.
caption: Emperor Constans II (630–668)
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