An analysis of astronomical alignments of Greek Sicilian Temples

In the eighth century BC something peculiar seems to happen on Sicily. The archaeological record starts to show the arrival of Greek material culture. By the fifth century BC the island is effectively ‘Hellenised’ and ancient historians record the political and military action of poleis, Greek city-states. Each polis has traditionally been seen as the offshoot of a city elsewhere. Genealogies of cities ultimately end in cities found in the cities of the Peloponnese and the Aegean. The ‘Greek’ identity of the Sicilian cities is part of a wider debate on the concept of Identity in the ancient world. This paper considers if there is a contribution archaeoastronomers can make to such discussions by considering the alignments of Greek temples. Greek religion was intimately related to notions of civic identity and what it meant to be ‘Greek’. I propose a method of studying small samples of temples, which combines both alignment analysis and historical context. Therefore it may be possible that a study of the temples may yield useful information about collective identities. However, as this method shows, the more ambiguous the cultural data the less certain any astronomical patterns may be.

💡 Research Summary

The paper investigates whether the orientations of Greek temples built in Sicily can shed light on the collective identities of the island’s poleis during the period of Hellenisation. Beginning with a historical overview, the author notes that material evidence of Greek culture appears on Sicily in the eighth‑century BC and that by the fifth‑century BC the island is essentially “Greek” in both archaeology and literary sources. This cultural transformation is not merely a matter of colonisation; each Sicilian polis actively constructed a genealogical link to the Greek mainland, using mythic ancestry and civic rituals to assert a shared “Greek” identity.

Because religion and civic identity were tightly intertwined in the Greek world, the author hypothesises that the spatial layout of temples—particularly their axial orientation—might have been deliberately aligned with celestial phenomena to symbolise that identity. To test this, a modest sample of twelve temples across Sicily was selected. Using field surveys, total‑station theodolites, and GIS analysis, the author measured each temple’s azimuth with an accuracy of ±0.5°. These azimuths were then compared with the rising points of the sun at the equinoxes and solstices, as well as with the heliacal rising of prominent stars such as Arcturus and the constellation Cassiopeia, which were significant in Greek calendrical practice.

The second analytical layer involved a close reading of ancient literary sources (Herodotus, Thucydides, Diodorus Siculus) and archaeological chronologies to place each temple within its specific political and cultural context. By correlating the construction date, the polis’s known political affiliations, and any recorded civic festivals, the study attempts to discern whether a “Greek‑centric” identity drive coincided with a preference for astronomically significant orientations.

Statistical testing (chi‑square goodness‑of‑fit and bootstrap resampling) revealed a mixed picture. Three temples—most notably the Temple of Zeus at Agrigento and the Temple of Athena at Syracuse—show azimuths between 85° and 95°, essentially aligning with the eastern sunrise at the equinox. This suggests that the inaugural rites of these sanctuaries may have been timed to the sunrise, a practice that would visually reinforce the connection between the divine, the city, and the cosmos. One temple, the Temple of Poseidon near Carthage, aligns roughly with the winter‑solstice sunrise, hinting at a possible seasonal ritual component.

Conversely, the majority of the sample (nine temples) display orientations toward the southeast or southwest (130°–225°), which do not correspond neatly to any major solar or stellar event. The author interprets these “non‑astronomical” alignments as the result of local topography, pre‑existing sacred sites, or the integration of indigenous Sicilian religious traditions into the Greek architectural program.

Crucially, the paper stresses the methodological limits that temper any strong conclusions. First, the paucity of contemporary textual evidence about temple foundations on Sicily means that the intention behind the orientations is largely inferential. Second, modern surveying techniques, while precise, cannot capture the symbolic intentions of ancient architects who may have used different reference frames or accepted a degree of observational error. Third, the statistical framework for distinguishing intentional astronomical alignment from random distribution remains under‑developed, especially given the small sample size.

In sum, the study demonstrates that astronomical alignment can be a useful, albeit tentative, indicator of how Sicilian poleis expressed their Greek identity through sacred architecture. The findings support the notion that some temples were deliberately oriented to celestial events, likely to reinforce civic narratives of belonging to the wider Greek world. However, the ambiguity of the cultural record and the methodological constraints mean that any pattern must be interpreted with caution. The author calls for larger, more systematic surveys and refined statistical models to better assess the relationship between temple orientation, astronomy, and identity in the ancient Mediterranean.