FilmSwords is a company makes medieval decorative swords “as seen in the movies.” This makes me believe that the Swedish film “Arn: The Knight Templar” is more popular than I thought.
Peter Johnsson (who works as designer for Albion) modelled it on a type of sword being used at the end of the 1100s. A well-known representative of this type exists and is preserved in the Kunsthistorisches Museum in Vienna: the sword of Saint Maurice, part of the imperial regalia of the Holy Roman Empire.
Arn was given his sword by his master and mentor, monk and one-time Templar, Brother Guilbert.
The sword bears an inscription “In hoc signo vinces” – “With this sign though shall be victorious.” This motto is not exclusively a Templar device, but it was somewhat favored by the Knights of the Temple. Other than that I have nothing to say about the authenticity of the sword. Buy at your own risk!
For a very serious Templar buff, there are functional swords, such as this one by Marco of Toledo: