Spatha and Seax: The Two Blades That Became the Viking Sword
The Viking sword did not appear from nowhere. Its straight, double-edged, fullered blade is a direct descendant of the Roman spatha, passed down through the Migration-era Germanic kingdoms, and it was carried alongside a second blade that almost every Norseman owned and almost no film shows: the seax. Between them, the spatha and the seax explain where the Viking Age's weapons came from. Here is the story of both.
The Spatha: Rome's Long Sword
The spatha is the long, straight, double-edged sword of the later Roman army. Where the famous gladius was a short infantry blade of 18 to 24 inches, the spatha carried a blade of 24 to 36 inches. It began as a cavalry sword in the 1st century AD — a rider needs reach — and was likely adopted from the Celtic longswords of Rome's auxiliary horsemen. By the 3rd century it had replaced the gladius for the infantry as well, as Roman tactics shifted from tight shield-wall thrusting toward looser formations and more cutting.
Late Roman spathae were well-made weapons, often pattern-welded, with fullered blades and simple guards and pommels of wood, bone, or bronze. When the Western Empire fell, the sword did not. Frankish, Gothic, Saxon, and Vendel-era Scandinavian warriors carried swords that were spathae in everything but name, and through them the design passed directly into the Viking Age.
From Spatha to Viking Sword
Put a 4th-century spatha next to a 9th-century Viking sword and the family resemblance is obvious: both are straight, double-edged, around 30 inches in the blade, with a wide fuller and a point made more for cutting than thrusting. What the Norse and Frankish smiths added was the hilt — a short, thick cross guard and the lobed or "tea cosy" pommel that make a Viking sword recognizable — and, in the case of the Ulfberht blades, a far higher quality of steel. The Carolingian sword of the Frankish empire is the bridge between the two, and our Carolingian sword guide covers that step.
The Seax: The Blade Every Viking Carried
A sword was expensive — a farm's worth of wealth — and most Viking Age men never owned one. What they did own was a seax (also sax or scramasax): a single-edged knife with a thick spine and a straight or broken-backed blade, worn horizontally at the belt in a sheath. The seax was the Germanic peoples' universal tool and weapon from the 5th century to the 11th, and it is the blade that gave the Saxons their name.
Seaxes came in every size. The small hadseax of 3 to 8 inches was an everyday knife for eating and work. The langseax, with a blade of 20 inches or more, was a true fighting weapon, a short sword in everything but its single edge and its lack of a guard. The distinctive broken-back seax, with its spine angling sharply down to the point, is the classic Anglo-Saxon and Viking form. Because the seax was the common man's weapon, it is found in far more graves than the sword, and it appears in the hand of the lion in the coat of arms of Essex to this day.
Spatha and Seax Compared
The two blades filled opposite roles. The spatha and its Viking descendant were the elite warrior's weapon: double-edged, guarded, built for the shield wall and the mounted charge. The seax was the everyday blade: single-edged, guardless, equally at home butchering, carving, and fighting. A wealthy Viking carried both — the sword for battle and the seax for everything else, including the moment a sword was lost or broken.
Owning a Spatha or Seax Today
Both blades offer something the standard Viking sword does not: the spatha is the authentic choice for Roman, Migration-period, and early Germanic collections, and the seax is the most historically accurate Viking blade most collectors can own. Ours are hand-forged in 1095 high-carbon and Damascus steel, sharpened, with sheaths included. See the Damascus spatha, the Viking seax, and the 50-inch great seax war sword, or browse the full Viking sword collection and the Roman sword collection.
Spatha and Seax FAQ
What is a spatha?
The long, straight, double-edged sword of the later Roman army, with a blade of 24 to 36 inches. It began as a cavalry weapon and replaced the gladius by the 3rd century AD.
What is the difference between a spatha and a gladius?
Length and use. The gladius is a short thrusting sword (18 to 24 inch blade) for tight infantry formations; the spatha is a longer cutting sword that started with cavalry and later became standard for all troops.
Did the Viking sword come from the spatha?
Yes. The Viking sword descends from the Roman spatha through the Germanic swords of the Migration and Vendel periods and the Carolingian sword of the Frankish empire.
What is a seax?
A single-edged Germanic knife or short sword, worn at the belt and used by Saxons, Franks, and Vikings as both a tool and a weapon from the 5th to the 11th century.
How big is a seax?
Anywhere from a 3-inch utility knife to a langseax with a blade over 20 inches. Most fighting seaxes carried blades of 10 to 20 inches.
What is a broken-back seax?
The classic Anglo-Saxon and Viking pattern, where the spine runs straight then angles sharply down to meet the edge at the point. It is the most recognizable seax shape.
