Visby Lens

Description:

Originally designed by crafters in the town of Visby on the isle of Gotland, and later perfected by Rasmus of Visby, a most unusual Jarl, these lenses are used for navigation. Even simple lenses can be used to detect the location of the sun on an overcast day with precision, allowing the superb navigation for which the ships of Gotland are known.

Bio:

Visby Lens

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