Glassware 550 History 164 Glass manufacture 57 Collectors and collecting 55 Art collections 33 Private collections 21 Glass 17 Pottery 17 Art nouveau 16 Cut glass 15 Decoration and ornament 13 Glass art 12 Glassware, Ancient 12 Engraved glass 9 Glass painting and staining 8 Art 7 Furniture 7 Pressed glass 7 Trademarks 7 Art objects 6 Bottles 6 Drinking vessels 6 Glass, Colored 6 Art glass 5 Glassware, Roman 5 Museums 5 Conservation and restoration 4 Glass trade 4 Glassware, Victorian 4 Glassworkers 4