This church contains the tomb of Agnés Sorel , Charles VII’s mistress, who lived in the château during their affair. Notoriously beautiful and fiercely intelligent, Agnés earned many courtly enemies due to her powerful influence over Charles. Having borne three daughters, she died in mysterious circumstances while pregnant with their fourth child. The official cause was dysentery, although some scientists speculate that elevated levels of mercury in her body indicate she may have been poisoned.