Dante Alighieri notable work De Monarchia
Dante took part in several attempts by the White Guelphs to regain power, but these failed due to treachery. Bitter at the treatment he received from his enemies, he grew disgusted with the infighting and ineffectiveness of his erstwhile allies and vowed to become a party of one. He went to Verona as a guest of Bartolomeo I della Scala, then moved to Sarzana in Liguria. Later he is supposed to have lived in Lucca with a woman named Gentucca. She apparently made his stay comfortable (and he later gratefully mentioned her in Purgatorio, XXIV, 37). Some speculative sources claim he visited Paris between 1308 and 1310, and other sources even less trustworthy say he went to Oxford: these claims, first made in Boccaccio's book on Dante several decades after his death, seem inspired by readers who were impressed with the poet's wide learning and erudition. Evidently, Dante's command of philosophy and his literary interests deepened in exile and when he was no longer busy with the day-to-day business of Florentine domestic politics, and this is evidenced in his prose writings in this period. There is no real evidence that he ever left Italy. Dante's Immensa Dei dilectione testante to Henry VII of Luxembourg confirms his residence "beneath the springs of Arno, near Tuscany" in March 1311.In 1310, Holy Roman Emperor Henry VII of Luxembourg marched into Italy at the head of 5,000 troops. Dante saw in him a new Charlemagne who would restore the office of the Holy Roman Emperor to its former glory and also retake Florence from the Black Guelphs. He wrote to Henry and several Italian princes, demanding that they destroy the Black Guelphs. Mixing religion and private concerns in his writings, he invoked the worst anger of God against his city and suggested several particular targets, who were also his personal enemies. It was during this time that he wrote De Monarchia, proposing a universal monarchy under Henry VII.
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