At the time of the Interregnum, the German throne was not empty: it was bought by foreign princes and monarchs. Nevertheless, there was no supreme power in the state. In Germany, there were about a hundred principalities, mostly bishops. All of them were independent of the emperor, and some in general were vassals of foreign monarchs. The most influential in the state were the Electors.
But several decades passed, and political disorder began to bore everyone, even the feudal lords. In 1273, they elected Emperor Count Rudolf...Habsburg, who initiated the Habsburg dynasty. The princes chose him precisely because he was not rich, and therefore depended on them. However, Rudolf Habsburg quickly became wealthy and became independent of his persistent guardians. He conquered the Czech Republic and appropriated the lands of the Czech crown – Austria, Styria, Carinthia and Krainu. Habsburg also lived in Alsace and Switzerland. So there was the largest duchy of Germany – the Austrian, which later became a separate European state – Austria.
Electors are princes who elect a monarch.