14th-century inventions

explosive weapon for use in seas and waterways, triggered by the target's approach

right|thumb|A Springfield Model 1888 rifle with its breech open. right|thumb|Schematic of various forms of locking on breechloading firearms. A breechloader is a firearm or artillery piece in which the user loads the ammunition from the breech (rear) end of the barrel. The vast majority of modern firearms are breech-loaders.

rocket that uses two or more stages in series

calibrated wooden rod with sliding crosspiece used for measuring the altitude of celestial bodies or the height of distant objects

Bidriware is a metal handicraft from the city of Bidar in Karnataka, India. It was developed in the 14th century C.E. during the rule of the Bahmani Sultans. The term "bidriware" originates from the township of Bidar, which is still the chief center of production. The metal used is white brass that is blackened and inlaid with silver. As a native art form, Bidriware obtained a Geographical Indications (GI) registry on 3 January 2006.

thumb|The astrarium made by Giovanni Dondi dell'Orologio showed hour, year calendar, movement of the planets, Sun and Moon. Reconstruction, [[Museo Nazionale Scienza e Tecnologia Leonardo da Vinci, Milan.]]