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Allison C. Meier

Allison C. Meier is a Brooklyn-based writer focused on history, architecture, and visual culture. Previously, she was a staff writer at Hyperallergic and senior editor at Atlas Obscura. She moonlights as a cemetery tour guide. Contact her on Twitter @allisoncmeier.

Astrolabe

The San Zeno Astrolabe Tracked Time by the Stars

The astrolabe was a revolutionary tool for calculating celestial positions and local time. The device's design dates back to Islamic antiquity.