Deliverance by James Dickey (in 2001, named as one of the 100 best English-language novels of the 20th century, as chosen by the editorial board of the Modern Library.)
... the Schmalkaldic League in 1546 and defeated John Frederick I[?] of Saxony and imprisoned Philip of Hesse[?] in 1547. At the Diet of Augsburg[?] in 1547 he created a ...