A medieval astronomical instrument discovered entirely by accident has turned out to be a powerful record of cross-cultural scientific collaboration.
The brass astrolabe dates back to 11th century Spain – but was subsequently engraved with annotations and amendments over the centuries, in multiple languages, as changing owners adapted and updated it for their own use.
The object is, therefore, not just a rare artifact, but almost unique: a palimpsest that records changing ideas and needs of its users as the world and context changes.
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