Ca. 800-1000 AD. An intricately designed ceramic hollow vessel with an elongated body, finely constructed neck, a tapered base, and a broad top with a small spout, which was likely filled with explosive liquid. The body of the vessel is decorated with engraved patterns, showcasing the Byzantine Empire's artistic prowess. The function of these vessels was to serve as hand-held weapons, used to destroy enemy ships in naval battles. The vessels were hurled at the enemy ships, shattering on impact and releasing the highly flammable and explosive liquid onto the enemy vessel, causing widespread destruction. The use of Greek fire hand grenades was a significant advantage for the Byzantines in naval warfare, as it allowed them to dominate the seas and protect their empire.Size: L:75mm / W:130mm ; 390gProvenance: Private UK collection; From an old British collection formed in the 1990s.