Glass production has been around for 3000 years but they were not incorporated into early castles for one obvious reason. They offer no military defense and castles were military installations. So its unlikely that windows were added till after the period that castles were strategically important. THis would have probably been during the Elizabethan/Tudor period when castles became more like stately homes than defensible miltary installations.
Probably the only place you would have found glasing in a medieval Castle would have been the chapel which may have had a stained glass window in it.
Of course castles could have been retrofitted with glass but few were built with it as part of the original design.
metallic oxides such as those of copper, cobalt, etc are used to color glass.
Glass was used as a lens protector. Now we use plastic.
In stained glass, they use things in normal glass but add colors and make it thinner.
Glass is see through and is better quality than plastic. Plastic is not as see through as glass anyway.
salammoniac is used to clean and tin the soldering iron that solders the lead that holds the stained glass together.
Castles didn't have stain glass windows ( some do today because they have been added) because they were built for protection and defense.
Motte and Bailey castles and Concentric castles
In 1066 Motte and bailey castles were used
they stopped using castles because they did
Alice Glass and Ethan Kath, an electronic duo from Toronto, Canada.
The castles were used to defend an area.
Hey used stone to build the castles.
Since Alice Glass is the lead vocalist and lyricist of a band called Crystal Castles, and is not a movie or film, there is no background music for Alice Glass.
I really hope so, she's HOT!
Castles in the Middle Ages were used to keep out enemies.
Sand castles, if in a bag, weights for holding stuff down, it could be used for glass, artificial beaches, could be a replacement soil for plants that survive with it and it can have the silicon extracted out of it to be used for computer chips.
Palaces are used for Kings, queens, princesses and prince's and castles are used for safety