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Archival complex: Prefettura di Agrigento: Atti finanziari e di Pubblica Sicurezza 1828 - 1905, busta n° 51
Sender: Reale Università di Catania
Recipient: Prefetto della Provincia di Girgenti
Date: Oct. 14, 1883
Content: Professor Orazio Silvestri informs the Prefect that experimental investigations are underway to study the geological conditions of the ground and the materials with which the monuments were built and to repair and prevent the alterations suffered by them over time.