Some of my illustrations tracking the changes in armour from 13th to 17th century.
(A) Early 13th,century. Conical helmet with face mask, Mail worn above a cloth aketon covering all the body with a cloth surcoat worn above.
(B) Mid to late 13th,century. Larger helm protecting the head but still predominantly mail protecting the whole body. Addition of a plate knee cop fixed to the mail or gamboised cuisse. Later in the century a coat of plates or reinforced surcoat was worn.
(C) Early 14th century. Plates added to arms and lower legs over mail. Addition of sabaton to protect the feet.
(D, E, F,) Mid 14th century. Bascinet to protect head with visor, also the addition of mail aventail to protect the neck. Surcoat shortened at the front as century progresses but mail is still worn beneath. coat of plates and eventually a cuirass. Stud and splint armour is developed. Gauntlets made from plates to protect hands. Great helm often worn above the bascinet.
(G) Late 14th century. The longer Surcoat has now developed from a loose coat into a tight short covering called the Jupon.
(H) Early 15th century. Plate now covering the body completely. The Bascinet developed a gorget to become Great bascinet. Thin strips of metal Fauld plates are developed to protect the hips and upper thigh. Later small lower plates at the thighs are developed into Tassets.
(I, J,) Mid to late 15th century. Development of differing styles of plate armour. Italian using clean plain lines with little decoration whilst German armour develops fluted ridges that emulates the Gothic lines of architecture. Helmets include the Armet and Sallet. Sabatons are pointed.
(K, L) Early 16th century. The Fluted ridges develop into extreme decoration seen on Maximilian armour Whilst the Plain lines of Italian armour remain in use. Both German and Italian armour incorporate both styles. The Close helm is developed and Sabatons become enlarged at toe. Etched and engraved decoration developed to extreme patterns and illustrations on armour. Greenwich armouries.
(M) Mid to late 16th century. Peascod breastplate developed. Blued armour with gilded decoration. Sabatons become rounded and normal shoe shaped. Complete harness made with additions for different types of combat.
(N, O) 17th century. Heavier plate to protect from firearms. Decorative officers armour used as status symbol rather than protection. Leg and arm armour discarded eventually so that only the cuirass and helmet was in use. Sometimes a long single gauntlet was used to protect the left hand and arm.