This conical sundail was crafted by an Alexandrian technician and dedicated to King Ptolemy II (or perhaps to Ptolemy III in the early years of his reign), by a donor who probably was an important citizen of Herakleia. It tesifies to the export of technological know-how from Alexandria to the provinces of the Ptolemaic empire and was probably used to schedule public activities (religious or administrative) in an institutional or religious building, or perhaps in a gymnasium.
Images
Photo 1: Photo of the main quadrant with the underlying dedication, from Wörrle 1988, p. 475, Pl. 5
Photo 2: General view of the artefact, from the
website of the Musée du Louvre