Ratchis (King of the Lombards; 744–749)
Ratchis († after 757) was the Duke of Friuli (739–744) and King of the Lombards (744–749).
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The “Historia Langobardorum” by Paul the Deacon
The “Historia Langobardorum” is the oldest chronicle relevant to the history of Venice. It probably dates to the 780s or 790s.