The Albertinian line was a line of the Habsburg dynasty, begun by Duke Albert III of Austria, who, after death of his elder brother Rudolf IV, divided the Habsburg hereditary lands with his brother Leopold III by the 1379 Treaty of Neuberg.
Having assumed the rule over Austria, Albert V in 1421 married Elizabeth of Luxembourg, the only child of Emperor Sigismund.
In 1438 he also was elected King of the Romans (as Albert II) and Emperor-to-be, anticipating the powers of the later Habsburg monarchy, however, he died the next year.
The Hungarian throne passed to Polish king Władysław III against the fierce resistance of Albert's widow Elizabeth.
Ladislaus' claims to Hungary were acknowledged after King Władysław had been killed in the 1444 Battle of Varna, however, he became the real ruler only after the death of regent John Hunyadi in 1456.