Complex sentence: In the nineteenth century the adjacent Mutualité site was occupied by a seminary where Renan studied under the direction of the Abbé Dupanloup who attained celebrity in 1838 when he reconciled the former bishop and diplomatist Talleyrand on his death-bed.
Split into simpler sentences: In the nineteenth century the adjacent Mutualité site was occupied by a seminary. There, Renan studied under the direction of the Abbé Dupanloup, who attained celebrity in 1838 when he reconciled the former bishop and diplomatist Talleyrand on his death-bed.