In late 1236, Duke Otto had joined King Henry against Frederick II of Austria, along with a large host of other princes, in laying siege to Vienna, yet were welcomed into the city by its citizens where they wintered.
Duke Otto had joined King Henry against Frederick II of Austria. This was in late 1236. This was along with a large host of other princes, in laying siege to Vienna. Duke Otto were welcomed into the city by its citizens. This was in late 1236. They wintered.