The abbey of San Galgano is an abbey about thirty kilometers from Siena, in the municipality of Chiusdino. The site consists of the hermitage (called "Rotonda di Montesiepi") and the large abbey destination for tourist flow. The lack of the roof - which highlights the articulation of the architectural structure - unites the abbey with those of Melrose, Kelso and Jedburg in Scotland, Tintern in Wales, Cashel in Ireland, Eldena in Germany, Beauport in Paimpol (Brittany). Here is the SWORD IN THE ROCK. San Galgano died in 1181 and, having converted after a disordered youth, retired to a hermit's life to give himself to penance, with the same intensity with which he had previously given himself to debauchery. The climax of the conversion took place on Christmas day 1180, when Galgano, arrived on the Montesiepi hill, stuck his sword in the ground, in order to transform the weapon into a cross; in fact in the Rotonda there is a boulder from whose cracks emerge a hilt and a segment of a sword corroded by years and rust, now protected by a Plexiglas case. The evident echo of the Arthurian myth has not failed to raise curiosity and, obviously, some daring hypotheses on possible relationships between the mythology of the Round Table and the history of the Chiusdinese saint.