11th-century inventions

thumb|Ritual devils and townspeople participate in a Correfoc (firerun) at the culmination of Festa Major 2012, in Vilanova i la Geltrú Fireworks are low explosive pyrotechnic devices used for aesthetic and entertainment purposes. They are most commonly used in fireworks displays (also called a fireworks show or pyrotechnics), combining a large number of devices in an outdoor setting. Such displays are the focal point of many cultural and religious celebrations, though mismanagement can lead to fireworks accidents.

thumb|An iron grenade with a wooden fuse from 1580 A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechanical stress, the impact and penetration of pressure-driven projectiles, pressure damage, and explosion-generated effects. Bombs have been utilized since the 11th century starting in East Asia.

clock with special mechanisms and dials to display astronomical information

thumb|The weave of calico sample from a shopping bag shown against a [[centimetre scale]] Calico (; in British usage since 1505) is a heavy plain-woven textile made from unbleached, and often not fully processed, cotton. It may also contain unseparated husk parts. The fabric is coarser than muslin, but less coarse and thick than canvas or denim. It is still very cheap owing to its unfinished and undyed appearance.

system of printing and typography that uses movable components

thumb|Equatorium from Johannes Schöner

straight, double-edged bladed weapon