Person

Frederick IV, Duke of Austria

1382–1439 · 15th century · Also known as Frederick of the Empty Pockets

Frederick IV, Duke of Austria, of the Habsburg dynasty, ruled Tyrol and the Habsburg lands in Further Austria. In 1415 he helped the antipope John XXIII flee the Council of Constance, and King Sigismund outlawed him. The Swiss Confederates, led by Bern, then seized the Aargau, including Habsburg Castle, the dynasty's ancestral seat.

Frederick IV, Duke of Austria
Image: Antoni Boys · Public domain · Wikimedia Commons

Mentioned in 2 state histories

County of HabsburgCanton of Schaffhausen

See also

Cite this entry
APA
The Epoch Institute. (2026). Frederick IV, Duke of Austria. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/frederick-iv-duke-of-austria
MLA
“Frederick IV, Duke of Austria.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/frederick-iv-duke-of-austria. Accessed .
Chicago
The Epoch Institute. “Frederick IV, Duke of Austria.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/frederick-iv-duke-of-austria.
Harvard
The Epoch Institute (2026) ‘Frederick IV, Duke of Austria’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/frederick-iv-duke-of-austria (Accessed: ).

Last reviewed October 2026Random entry ↻