The orientation of Trajan's town of Timgad

A novel application of solar energy equations to archaeoastronomy reveals that Timgad, the Roman town founded by Emperor Trajan, was likely established during the first decade of September. This discovery leverages the sunrise amplitude equation, typically used in solar energy studies, to deduce the orientation of a town's main street based on its day of foundation. The research demonstrates how ancient urban planning may have aligned with celestial events, offering new insights into Roman architectural practices and chronological dating.

Sparavigna, A. C. (2012). The orientation of Trajan's town of Timgad (Version 2). arXiv. https://doi.org/10.48550/ARXIV.1208.0454