Glass

=__Glass__=

==Glass was first used in Roman imperial times, it was transparent and colorless glass used for windows until the Venetian manufacture of cristallo, then came the stained-glass windows, then in the 17th century, large sheets of glass. In general, glass of the earliest times displays little homogeneity. Afterwards glass begins to appear in great quantities. This contrasts with the meagre contemporary finds on Egyptian soil. In Egypt they were usually decorated with light-coloured threads on a dark, usually blue, ground (familiar from the Egyptian 18th dynasty), but a notable variation was displayed in pieces decorated with dark purple threads on a white ground. In the Hellenistic period (roughly from the 4th century BC) the shapes of glass degenerated. The technique of decoration, was the same; new colour combinations were used, and indeed these combinations continued into the era of blown glass. now days in architecture glass is used as an artistic item to decorate facades and give the spaces a feeling of openess, which creates tendencies in the world of the interior design and artistic ideas.==