He was tried and condemned to death for being a heretic, but the sentence was commuted to perpetual imprisonment, while his wife was immured in a convent.
Immured in his castle at Pavia, accumulating wealth by systematic taxation and methodical economy, he organized the mercenary troops who eagerly took service under so good a paymaster; and, by directing their operations from his cabinet, he threatened the whole of Italy with conquest.
Many condemnations followed, and hundreds of politicals were immured in hideous dungeons, a state of things which provoked Gladstones famous letters to Lord Aberdeen, in which Bourbon rule was branded for all time as the negation of God erected into a system of government.
John sought safety in flight, but was discovered in his place of hiding and brought back to Rome, where after enduring cruel and ignominious tortures he was immured in a dungeon.
In June 1619 he was immured in the fortress of Louvestein near Gorcum.
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