KnowraFrederick II, Holy Roman EmperorLinked fromLinked fromThe 24 pages that link to Frederick II, Holy Roman Emperor, each with the reason it gives.All 24Broader topic 2Related 19Compared with 3Pope Gregory IXCompared with: Their struggle over imperial power and the papal states defined much of Gregory’s pontificate.Fifth CrusadeCompared with: His delayed participation frustrated the Fifth Crusade’s planners and contrasted with his later negotiated recovery of Jerusalem.Barons' CrusadeCompared with: His earlier diplomatic success provided a precedent, though he led a royal rather than baronial expedition.