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Sándor Keszthelyi


December 2015
Page 44

Analysis of a stone fragment found at a Benedictine monastery excavation, identified as a medieval vertical sundial. Its hour lines are nearly equiangular, suggesting monastic or temporal timing, and it is dated to the late 15th or early 16th century, before 1555.
Dials: Vertical, Historical Dials, Mathematics of Dialling