The oldest archaeological excavations of glass-making sites in the region date to around 1250 and are located in the Lusatian Mountains of Northern Bohemia. Other notable Czech sites of glass-making throughout the ages are Skalice (), Jablonec nad Nisou, Železný Brod, Poděbrady, Karlovy Vary, Kamenický Šenov () and Nový Bor (). Several of these towns have their own glass museums with many items dating to around 1600. Jablonec nad Nisou in particular is famous for the local tradition of manufacturing glass costume jewellery. Its long history is documented by large collections in the Museum of Glass and Jewellery in Jablonec nad Nisou.