How to evaluate artifacts -- Chronology of events -- Agriculture and animal husbandry. Butter keg ; Horse collar ; Plow ; Sheepfold -- Armor, weapons, and tools. Arming sword ; Hounskull helmet ; Scabbard chape ; Spurs ; Trebuchet -- Art and architecture. Medieval barn ; Flying buttress ; Gargoyle ; Stained glass ; Tapestry -- Communication and business. Charter ; City seal ; Money bag ; Printing press -- Domestic items. Brassiere ; Comb ; Cradle ; Garderobe ; Loom ; Penannular brooch ; Poulaine ; Tunic -- Entertainment. Bone ice-skate ; Chessboard ; Citole ; Dance ; Tournaments -- Religion. Icon ; Jewish cemetery, Prague ; Misericord ; Pilgrim's badge ; Psalter ; Q'uran ; Reliquary -- Science and technology. Astrolabe ; Clock ; Eyeglasses ; Mason's divider/compass -- Transportation ; Cog ; Viking longboat ; Saddle.