+King Offa was a powerful ruler of [Mercia](/wiki/Mercia), dominating much of [Anglo-Saxon England](/wiki/Anglo-Saxon_England) from 757 to 796. He is best known for constructing [Offa's Dyke](/wiki/Offa's_Dyke), a massive earthwork marking the border with Wales, and for his influential coinage reforms.
+## See also
+- [Offa's Dyke](/wiki/Offa's_Dyke)
+- [Mercia](/wiki/Mercia)
+- [Heptarchy](/wiki/Heptarchy)
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