Early examples in Florence date from the mid fifteenth century and reached a peak of refinement and complexity in revetments of the Medici Chapel, produced under Medici patronage in the "Opificio delle Pietre Dure", which was established by Ferdinando I de’ Medici.
GPWS - Ground Proximity Warning System je sistem na letalu ali drugemu zrakoplovu, ki pilota obvešča o geografskih ovirah in tako prepreči kontroliran let v teren - (CFIT).