The spatha, a three foot (30 and 39 in) long sword, was used throughout the Roman Empire between the First and Sixth Centuries AD. The spatha was introduced by Celtic cavalry auxiliaries serving the Empire. By the Third Century, it had replaced the gladius as Rome’s standard infantry weapon.
The spatha later evolved into the Viking sword, which was used in Western Europe from 793 AD to 1066 AD. This design then influenced the European long sword, which was used by European knights during the 12th Century. It is also the weapon of choice in most Hollywood fantasy films.