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These remarkable "lenses" (also called the Visby Lenses) were discovered in Viking graves on the Baltic Sea island of Gotland, Sweden. They have such unbelievable imaging properties that attempts to optimize their performance using computers has failed - pretty good considering they are over 800 years old!!
Do they remind you of something else that is steeped in mystery, is crystal like and also displays amazing manufacturing qualities (the Crystal skulls).
After several years of painstaking analyses, eyeglass experts have now confirmed that the ground rock crystal objects from the 12th century found in Swedish Viking graves were made almost to perfection.
If the lens is placed on a text page, the effect is the same as that obtained with a modern magnification glass measuring 5cm in diameter. It was not until the 17th century that mathematician René Descartes successfully made theoretical calculations about aspherical lenses. However, this precision technology was not known to have been used in practice before the 20th century.
So how did they develop such sophisticated optical devices 8 centuries ago? Researchers from the University of California at Berkeley now want to further investigate the sensational "Viking" lenses. It is generally believed that the unusual items were originally manufactured in Byzantium, where they were purchased or stolen by the Vikings.
Klaus Dona
Ancient-Hebrew.org
Wikipedia
originally posted by: SprocketUK
originally posted by: Gothmog
Ahmed Ibn Fahdlan's ring ?
Star just for the movie reference
originally posted by: Gothmog
originally posted by: SprocketUK
originally posted by: Gothmog
Ahmed Ibn Fahdlan's ring ?
Star just for the movie reference
13th
Star for your knowing
originally posted by: ypperst
This is pretty neat. The ring was found in a grave near Birka on Björkö Island in the Stockholm archipelago in the late 1800s, made of silver alloy and is andorned with coloured glass, which was an expensive and exotic material at the time, engrave with the ancient Arabic script spelling the word 'for allah'. Other objects found in the grave indicated a woman had been buried there at around 850 AD.
www.thelocal.se... ties
What facinating tale such artifact can have.
Could it be a Arabic woman who settled down in Birka?
Was it traded, stolen or something entirely else?
I love how the old world seemed to have connections to each other, just like the story about that roman coin found in a chinese tomb for some time ago.
originally posted by: CulturalResilience
With the seafaring, piracy, and trading links of the time, it's not to difficult to arrive at the circumstances of what brought this object to that location.
originally posted by: Gothmog
originally posted by: SprocketUK
originally posted by: Gothmog
Ahmed Ibn Fahdlan's ring ?
Star just for the movie reference
13th
Star for your knowing
originally posted by: ypperst
The ring was found in a grave near Birka on Björkö Island in the Stockholm ...engrave with the ancient Arabic script spelling the word 'for allah'.
originally posted by: AMPTAH
originally posted by: ypperst
The ring was found in a grave near Birka on Björkö Island in the Stockholm ...engrave with the ancient Arabic script spelling the word 'for allah'.
Karma is a bitch, ain't it?
So, the Vikings of Sweden raided and plundered Islamic lands way down in the Mediterranean, hundreds of years ago, bringing back artifacts and treasures of Islamic design, evidence of how far afield those brave Victorious Vikings traveled.
Those were the days when "raiding and plunder" were acceptable forms of transactions between different peoples, providing the essential "motivation" bringing them into contact with each other.
So, now the modern Muslims invade Sweden, entering as refugees, the modern acceptable "motivation" for migrations, and the Swedes complain about all these foreigners coming in, invading their land, and disrupting their "peaceful" society.
Hmmm...who is in the right?