The Astrolabe was originally invented by Greek astrologers around 150 BC. This particular astrolabe is a Persian Planispheric Astrolabe from Hajji Ali, Isfahan, Iran, that dates back to 1790. The plaque that accompanies this item at the Mariner’s Museum states that during the late 13th century it became widely used by Mediterranean mariners for navigation. … Continue reading What is an Astrolabe?