12th-century inventions

thumb|upright=1.2|Wearing sunglasses under direct sunlight: Large lenses offer good protection, but broad temple arms are also needed against "stray light" from the sides.

type of unguided rocket artillery system

manufacturing technology where an unfinished product is moved from workstation to workstation where work steps are performed or parts are added in sequence until the product is complete

thumb|right|Torquetum (1568), made by Johannes Praetorius in Nuremberg thumb|right|Engraving of a Torquetum

earliest type of European windmill

thumb|right|Early cervelliere (11–12th century) thumb|Late cervelliere (14th century), also included as early form of bascinet