Flexible Glass

tiberius

Flexible glass is a legendary lost invention from the reign of Roman Emperor Tiberius Caesar (between 14 CE-37 CE). As recounted by Archbishop Isadore of Seville, the craftsman who invented the technique brought before Caesar a drinking bowl made of flexible glass, and Caesar threw it to the floor, whereupon the material dented, rather than shattering.

The inventor was able to simply repair the dent with a small hammer. After the inventor swore to the Emperor that he alone knew the technique of manufacture, Caesar had the man beheaded, fearing such material could undermine the value of gold and silver.

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