840

	Align	"center" colspan=2 <small>'''Years:'''</small><br> 836 837 838 839 - 840 - 841 842 843 844
	Align	"center" colspan=2 <small>''' 820s 830s - ''' 840s ''' - 850s 860s 870s
	Align	"center" <small>''' - ''' 9th Century ''' - 10th Century

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