1887

Abstract

Summary

We present a multi-methodological (GPR and microgravimetry) geophysical study to investigate the debated existence and placement of the “Telaro” foundation structure beneath the Basilica dello Spirito Santo in Naples, Italy.

GPR data were acquired at 400 and 150 MHz, and they revealed numerous shallow voids associated with burial sites. However, it did not detect the hypothesized Telaro, likely due to the limited permittivity contrast with the surrounding soil. Conversely, the microgravity data, following accurate data processing which included the computation of the vertical gradient was used to perform a 3D multiscale imaging modelling: the Depth from Extreme Points (DEXP) methods. The final model revealed a quadrangular framework connecting the column bases—interpreted as the actual Telaro—located at approximately 5 meters depth, shallower than the originally designed 7 meters. The gravity data also confirmed the presence of previously mapped voids. These findings provide key insights for both historical understanding and structural preservation. The results underscore the importance of integrating complementary geophysical methods to overcome interpretation challenges in complex subsurface environments and demonstrate the value of microgravimetry in archaeological prospection where electromagnetic contrasts may be insufficient.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202520245
2025-09-07
2026-02-19

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/content/papers/10.3997/2214-4609.202520245
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Integrated Geophysical Modelling on the Long-Debated Foundations of the “Basilica Dello Spirito Santo” in Naples (Italy)
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202520245
/content/papers/10.3997/2214-4609.202520245
/content/papers/10.3997/2214-4609.202520245
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