Engelbert III, Margrave of Istria
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Engelbert III[lower-alpha 1] (died 6 October 1173), a member of the Rhenish Franconian House of Sponheim, was Margrave of Istria[1] from 1124 until his death.
Engelbert III[lower-alpha 1] (died 6 October 1173), a member of the Rhenish Franconian House of Sponheim, was Margrave of Istria[1] from 1124 until his death.