Background
He was a younger son of Vlastimir, who ruled in c.
He was a younger son of Vlastimir, who ruled in c.
Peace was subsequently agreed and the two sons of Mutimir. Pribislav and Stefan Mutimirović escorted prisoners towards the border at Rasa. There Boris gave them rich gifts and was given 2 slaves, 2 falcons, two dogs, and 80 furs by Mutimir.
After power struggle between the younger brothers and Mutimir, he and Gojnik was captured and sent as prisoners to Bulgar Khan Boris I in 855-856, as a token of peace-agreement, they both lost their titles as Princes of Serbia and were held at Pliska, the Bulgarian capital.
Strojimir was treated well by the Bulgarians, Khan Boris himself chose the wife of Klonimir Strojimirović, the son of Strojimir. On July 11, 2006, A Golden seal of Strojimir dated to 855–896 was bought by the Serbian state from an auction in Munich, Germany, by an unknown Russian.
lieutenant was sold for a total 20,000 €, outpaying the Bulgarian offer of 15,000 €. lieutenant is of Byzantine handcraft (from Athens, Thessaloniki or Constantinople), weighs 15,64 g, has a Patriarchal cross in the center and Greek inscriptions that say: "God help Strojimir" (CTPOHMIP)".