armor from the 11th century to the 14th century.. armor from the 11th century to the 14th century. Normans in chain-mail suits of armor and medieval knights in full plate armor. Copperplate engraving by Blake from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1820.