Question: Petras Jonaitis Mantigirdaitis, was a prominent noble of the Grand Duchy of Lithuania. in 494, Mantigirdaitis was sent on the diplomatic mission to negotiate peace with the Grand Duchy of Moscow and marriage of Helena of Moscow to where?
Sentence (from "Petras Jonaitis Mantigirdaitis"): Then Mantigirdaitis presented Alexander with a naked sword and a reminder that Alexander was elected to be a just ruler.
Relevant evidence: Yes