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Poemas del río Wang: Drawing the time: all a meridian can measure -
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"It was the image of the sunspot falling through the camera obscura on the floor of the Basilica di San Petronio in Bologna, which stopped me. I have never reflected so far on the concept of the meridian, and even less on the meridians we can draw anywhere on the basis of a light spot at noon. However, I have known this spot – and quite far from Bologna. It runs, month after month, on the great meridian of the former hospital in Tonnerre, founded in 1293 by Margaret of Burgundy, widow of Charles of Anjou, King of Sicily." -
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