Ronald Ewart Oakeshott was a British illustrator, collector, and amateur historian who wrote prodigiously on medieval arms and armour. He was a Fellow of the Society of Antiquaries, a Founder Member of the Arms and Armour Society, and the Founder of the Oakeshott Institute. He created a classification system of the medieval sword, the Oakeshott typology, a systematic organization of medieval weaponry.
Ewart Oakeshott
The Oakeshott typology is a way to define and catalogue the medieval sword based on physical form. It categorises the swords of the European Middle Ages into 13 main types, labelled X through XXII. The historian and illustrator Ewart Oakeshott introduced it in his 1960 treatise The Archaeology of Weapons: Arms and Armour from Prehistory to the Age of Chivalry.
Type X. Note the disk shape pommel and long fuller that extends near to the end of the blade.
Type XI.
Type XIV. Note flat cross section (lenticular), demonstrated by lack of a visible midrib towards the point. Broad and triangular in profile.
Type XV.