Konrad von Thüringen (c. 1206-24 July 1240 in Rome) was the brother-in-law of Saint Elisabeth of Hungary and the fifth Grand Master (Hochmeister) of the Teutonic Order, from 1239 to 1240.

Konrad was born the youngest son of Hermann I, landgrave of Thuringia, and Sophia, the daughter of the duke of Bavaria. His elder brother Ludwig was married to Saint Elisabeth. When Ludwig died in 1221 on a crusade, his brother Heinrich Raspe became regent for Ludwig's minor son Hermann II, and Konrad took on the title of count of Gudensberg in Hessen, assisting his brother in ruling the area.

On Elisabeth's death in 1231, Heinrich took Thuringia for himself, and together with Konrad, worked to consolidate power. Konrad 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. He also made an unsuccessful siege of the city of Fritzlar in 1232.

Elisabeth had founded a hospital in Marburg and had intended to bequeath it to the Johanniter Order, but this was rejected by Konrad von Marburg. Pope Gregory IX sent a commission to settle the matter, and it decided in favor of Konrad von Marburg on 2 August 1232. In the summer of 1234, Konrad von Thüringen travelled to Rome and convinced the Curia to turn the hospital and parish church in Marburg over to the Teutonic Order, which had founded a house in the city the previous year. In November, Konrad set aside his temporal title and entered the Order himself. The next year, he joined the commission to Rome that represented his sister-in-law in the cannonization 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, Konrad became the head of the Teutonic Order. While on a trip to Rome in the early summer of 1240, he fell ill and died. He was buried at the Elisabethkirche in Marburg.

1240 deaths | German nobility | Teutonic Knights | Grand Masters of the Teutonic Order

Konrad von Thüringen | Thüringiai Konrád | Konrad von Thüringen