Francesco I Crispo, Patrizio Veneto (died 1397) was the tenth Duke of the Archipelago through his marriage and the will of Venice.
He was Baron of Artrogidis and Lord of Milos between 1376 and 1383. In 1383 he married Fiorenza I Sanudo, Lady of Milos, by whom he claimed and got the Duchy of the Archipelago and Naxos in 1383, also becoming Lord of Santorini in 1383, of Andros between 1383 and 1384, of Astypalea, of Delos, of Ios and of Paros in 1383, and Co-Lord of Amorgos, thus succeeding her cousin Nicholas III.
Francesco Crispo was probably born in Verona. He was Lord of Milos, thus vassal of the Duke of Naxos. He was also his cousin because he was married with a grand daughter of the Duke Guglielmo Sanudo. He might also have been a pirat. He was sent by the Republic of Venice to Naxos in march 1383. The then Duke Niccolo III dalle Carceri was deemed incompetent by Venice. The Republic was suffering from the ottoman conquest of the Aegean. Francesco Crispo was sent to help his cousin and lord.[1]
On the island, a hunt was suggested. Officially, on the way back Niccolo III, escorted by Crispo's men was attacked by rebels or thieves. He fell off his horse and died. To quench any revolt, Francesco Crispo had to assume power.[1]
The Republic of Venice quickly sent its congratulations.[2]
All the duchy's islands recognized the new duke, except Amorgos. A punitive expedition was sent and the island recognized the new duke.[2]
Andros was another problem. It belonged to Maria Sanuda, sister of the late duke. She had married the lord of Paros, Gaspard Sommaripa and was living of Paros. Francesco had given as a dowry Andros and Syros to his own daughter Pétronilla. Maria Sanuda-Sommaripa called for justice in Venice.[3]
With his wife he had eight children:
| Preceded by Nicholas III |
Duke of the Archipelago 1383–1397 |
Succeeded by Giacomo I |
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