Question: Who is the paternal grandfather of Henry Iii, Landgrave Of Upper Hesse?
Sentence (from "Louis I, Landgrave of Hesse"): After 1425 a conflict with the Electorate of Mainz over claims to power in Hesse broke out into open conflict and Archbishop Conrad III of Mainz suffered a decisive defeat at Fulda in 1427.
Relevant evidence: No