King Albert Sends a Messenger to Pope Boniface for his Imperial Crown', watercolour painting from the workshop of Diebold Lauber (1427-1471), 1450.

Albert I (1255-1308), also known as Albert of Habsburg, was the eldest son of King Rudolf I, and was made landgrave of Swabia in 1273, looking over his father's possessions in Alsace. He was then made Duke of Austria and Styria in 1283, alongside his younger brother Rudolf II. When his father died without managing to secure Albert's election as successor, he was forced to recognise the sovereignty of the elected King Adolf of Nassau. Albert did not abandon his hopes for the German crown however, biding his time and working with Adolf's enemies and former allies to eventually have him deposed in 1298, with Albert elected as king in his place. He fought and slew Adolf at the Battle of Gollheim when he refused to give up power. (Photo by: Pictures From History/Universal Images Group via Getty Images)