During the medieval period there were many advancements.
Justice and Law Codes: Justinian's Code, Great Council (Parliament), Magna Carta
Trade and Business: Marketplace & Trade Fairs, Banks
Architecture: Cathedrals, Castles, Romanesque, Medieval, Gothic Architecture
Formal Learning: Guilds, Universities
Public Conduct: Code of Chivalry, Heraldry, Holy Relics
Art: Stained Glass Windows, Tapestries, Gregorian Chants, Medieval Music, Epic Poetry, Troubadours, Illuminated Manuscripts, Mystery Plays, Miracle Plays, Morality Plays, Architecture
Farming: Horse-drawn plow, Horse Collar, Horseshoes
Weapons: Mace, Flail, Suit of Armor