Jobst was King of Germany for a few short weeks in the early 15th Century.

He was born in the mid-1350s in Brno, Moravia. His father was John Heyrn, Margrave of Moravia, and his mother was Margaret of Opava. His uncle was the Holy Roman Emperor Charles IV.

The 14th Century was a particularly turbulent time in German political history. Jobst succeeded his father in ruling the Margraviate of Moravia, beginning in 1375, and then ruled the Duchy of Luxembourg, beginning in 1388, courtesy of a gift from the German king Wenceslaus IV. Despite that handout, Jobst joined the League of Lords in rebelling against their king (his cousin), leading to his arrest and, later, deposition.

Not long afterward, Jobst found himself on the wrong side of the majority, facing imprisonment himself before making peace with the brothers of Wenceslaus. Stepping into the power vacuum after the deposition of Wenceslaus was Rupert, who ruled as King of Germany for a decade. When he died, in 1410, another power struggle ensued. Sigismund, brother of the deposed Wenceslaus, made a bid for the kingship and got the votes of three of the seven electors. (The German throne for many years was chosen by electors, who were usually German nobles.) However, the other four electors chose as their new king Jobst. One of those four was none other than Wenceslaus himself, who cast his vote not for his brother but for his cousin.

Jobst was King of Germany for just more than three months. He was declared king on Oct. 1, 1410, and he died on Jan. 18, 1411. Some sources suggest that he was killed.

Jobst had married twice, in 1372 to Elisabeth of Opole and two years later to Agnes of Opole. Neither marriage produced children.