14th century blue glass mosque lamp from Egypt. Projects text and motifs on the walls when lit.
https://diqn32j8nouaz.cloudfront.net...p_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...730#post163389
https://www.homemadetools.net/forum/...741#post163461
https://www.homemadetools.net/forum/...931#post171597
https://www.homemadetools.net/forum/...178#post172514
https://www.homemadetools.net/forum/...896#post133574
