a long grip similar to that of type XIIIa. The XIIa was originally a part of the XIIIa classification, but Oakeshott decided they "taper[ed] too strongly" and were "too acutely pointed" to fit appropriately. Type XIII This typifies the classic knightly sword that developed during the age of the Crusades. Typically, examples date to the second half of the 13th century. Type XIII swords feature as a defining characteristic a long, wide blade with parallel edges, ending in a rounded or spatulate tip. The blade cross section has the shape of a lens. The grips, longer than in the earlier types, typically some 15 cm (almost 6 inches), allow occasional two-handed use. The cross-guards are usually straight, and the pommels Brazil-nut or disk-shaped (Oakeshott pommel types D, E and I). Subtype XIIIa features longer blades and grips. They correspond to the knightly greatswords, or , appearing frequently in 14th century German, but also in Spanish and English art. Early examples of the type appear in the 12th century, and it remained popular until the 15th century. Subtype XIIIb describes smaller single-handed swords of similar shape. Very few examples of the parent type XIII exist, while more examples of the subtype XIIIa survive. A depiction of two-handed use appears in the Tenison (Alphonso) psalter. Another depiction of the type appears in the Apocalypse of St. John manuscript of c.1300. The "greatsword", within the context of the late medieval longsword, is a type of "outsize(d) specimen", specifically the type XIIIa. The weapons were referred to by a variety of names, as in ("big swords of Germany"). The larger subtype XIIIa sword has a grip approximately long. Type XIV Ewart Oakeshott describes swords of Type XIV classification as Eight of the nine examples Oakeshott provided of type XIV in Records of the Medieval Sword have the distinct blade profile of a very acute triangle, with only one specimen showing an accelerating taper toward the end of the blade. Type XV Straight tapering blade with diamond cross-section and a sharp point. Type XVa have longer, narrower blades and grips sufficiently long for two-handed use. In contrast to type XIV, these are more greatly designed for thrusting above cleaving, their appearance coinciding with the rise of plate armor. However, blades of similar cross-section and profile can be found well before the Middle-Ages and after, meaning this blade form should not solely be assigned the purpose