Frederick IV, Duke of Lorraine
A medieval duke who earned his nickname 'the Fighter' through relentless military campaigns to defend and expand his realm's borders.
1282–1329 (age 47)·Duke of Lorraine from 1312 to 1328·Birthday: April 15
Biography
Frederick IV's life was framed by conflict and the hard realities of maintaining power in the 14th century. Inheriting the Duchy of Lorraine in 1312, he ruled during a time when regional authority was constantly tested by neighbors and internal rivals. His epithet, 'the Fighter,' was well-deserved; his reign was a near-continuous series of military engagements. He fought alongside the French against the Flemish at the Battle of Cassel in 1328, solidifying an important alliance. Closer to home, he waged a protracted and ultimately successful war against the Bishop of Metz, a struggle that consumed much of his energy and resources. These conflicts, while securing Lorraine's position, also drained its treasury and left a legacy of a ruler defined by the sword. He died the year after his major victory at Cassel, passing a stabilized, if weary, duchy to his son, Rudolph.
#1 When Frederick Was Born
The biggest hits of 1282
Frederick's Life & Times
The world at every milestone
1282Born
1287Started school
1295Became a teenager
1298Could drive
1300Could vote
1303Turned 21
1312Turned 30
1322Turned 40
1329Died at 47
Key Achievements
- Successfully defended and asserted the territorial integrity of the Duchy of Lorraine against the Bishopric of Metz in a long-running conflict.
- Fought as a key ally of King Philip VI of France at the decisive Battle of Cassel in 1328, helping defeat the Flemish rebels.
- Strengthened the political ties between the Duchy of Lorraine and the Kingdom of France through his military service.
- Founded the collegiate church of Saint-Georges in Nancy, contributing to the city's religious architecture.
Did You Know?
He was the first Duke of Lorraine to bear the name Frederick.
His marriage to Elisabeth of Austria connected the House of Lorraine to European royal lineages.
The precise circumstances of his death in 1329 are not clearly detailed in historical records.
He was a contemporary of the more famous Robert the Bruce of Scotland.
“A duke's duty is to hold his land, by the sword if he must.”
