Question: What is the date of death of Henry Raspe, Landgrave Of Thuringia's father?

Knowledge 1: Henry Raspe, Landgrave of Thuringia
Henry Raspe  (1204 – 16 February 1247) succeeded his nephew Hermann II as Landgrave of Thuringia in central Germany in 1241; he later was elected anti-king in 1246–1247 in opposition to Conrad IV of Germany. [SEP] Knowledge 2: Hermann I, Landgrave of Thuringia
Hermann I (died 25 April 1217), Landgrave of Thuringiaand (as Hermann III)Count Palatine of Saxony, was the second son of Louis II, Landgrave of Thuringia ("the Iron"), and Judith of Hohenstaufen, the sister of Emperor Frederick Barbarossa.
Knowledge 1: Henry Raspe, Landgrave of Thuringia
Henry Raspe  (1204 – 16 February 1247) succeeded his nephew Hermann II as Landgrave of Thuringia in central Germany in 1241; he later was elected anti-king in 1246–1247 in opposition to Conrad IV of Germany. [SEP] Knowledge 2: Hermann II, Landgrave of Thuringia
Hermann II( 28 March 1222 in Creuzburg – 3 January 1241) was the Landgrave of Thuringia and the son of Louis IV, Landgrave of Thuringia, and Saint Elizabeth of Hungary.
Knowledge 1: Henry Raspe, Landgrave of Thuringia
Henry Raspe  (1204 – 16 February 1247) succeeded his nephew Hermann II as Landgrave of Thuringia in central Germany in 1241; he later was elected anti-king in 1246–1247 in opposition to Conrad IV of Germany. [SEP] Knowledge 2: Konrad von Thüringen
Konrad von Thüringen( c. 1206 – 24 July 1240) was the fifth Grand Master of the Teutonic Knights, serving from 1239 to 1240.A Landgrave of Thuringia from 1231 to 1234, he was the first major noble to join the military order.Conrad was the youngest son of Hermann I, Landgrave of Thuringia, and Sophia, a daughter of Otto I, Duke of Bavaria.His elder brother Louis IV of Thuringia was married to Saint Elisabeth of Hungary.When Louis died in 1227 during the Sixth Crusade, his brother Henry Raspe became regent for Louis' minor son Herman II, and Conrad took on the title of Count of Gudensberg in Hesse, assisting his brother in ruling the area.On Elisabeth's death in 1231, Henry Raspe took Thuringia for himself, and together with Conrad, worked to consolidate power.Conrad engaged in battle a number of times with Siegfried III, Archbishop of Mainz, at one point personally swinging him around and threatening to cut him in two.In 1232, he besieged the city of Fritzlar, massacring its populace and burning the church.Elisabeth had founded a hospital in Marburg and had intended to bequeath it to the Johanniter Order, but this was rejected by her" defensor", Conrad of Marburg.Pope Gregory IX sent a commission to settle the matter, and it decided in favor of Conrad of Marburg on 2 August 1232.In the summer of 1234, Conrad travelled to Rome and convinced the Curia to turn the hospital and parish church in Marburg over to the Teutonic Knights, which had founded a house in the city the previous year.In November, Conrad set aside his temporal title and entered the Teutonic Order himself.The next year, he joined the commission to Rome that represented his sister- in- law in the canonization process, and he remained in the court of the Pope until Pentecost of 1235 when she was declared a saint.Upon the death of Hermann von Salza, Conrad became the Grand Master of the Teutonic Knights.While on a trip to Rome in the early summer of 1240, he fell ill and died.He was buried in the Elisabeth Church in Marburg.

Answer: 25 April 1217