The Horologium Augusti or Solarium Augusti was an ancient monument of the Campus Martius built during the reign of Augustus. In theory, it functioned as a giant solar marker. An obelisk relocated to Rome from Heliopolis served as the gnomon. The obelisk today stands in the Piazza di Monte Citorio.
Horologium Augusti
12.4784316297
Leonhardt 2014
Wikipedia (English) Solarium Augusti
Haselberger 2014
Hannah 2011
Plin., NH (Mayhoff: PHI) 36.72-74
Pleiades
The Horologium Augusti or Solarium Augusti was an ancient monument of the Campus Martius built during the reign of Augustus. In theory, it functioned as a giant solar marker. An obelisk relocated to Rome from Heliopolis served as the gnomon. The obelisk today stands in the Piazza di Monte Citorio.
2021-06-29T09:27:50-04:00
41.9036188496
Horologium Augusti
Imagery location of Augustan meridian
Roman, early Empire (30 BC-AD 300)
The Roman period (i.e., the early Roman Empire) in Greek and Roman history. For the purposes of Pleiades, this period is said to begin in the year 30 before the birth of Christ and to end in the year 300 after the birth of Christ. [[-30, 300]]
300
Pleiades
2021-06-29T09:27:50-04:00
-30
OSM location of Piazza di San Lorenzo in Lucina
OSM Way 50017047
OpenStreetMap (Way 50017047, version 11, osm:changeset=102484476, 2021-04-07T12:51:46Z)
Location based on OpenStreetMap
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2021-06-29T09:27:50-04:00
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monument
A monument as defined by the Getty Art and Architecture Thesaurus term 300006958: "Structures or edifices of importance or historical interest, typically erected in memory of the dead or of an important event."