Using existing poems to form a cento is likely to be covered by fair use: you're typically using a relatively small portion of the original work, and you're contributing a lot of your own creativity.
Using someone else's cento poem would then require their permission.
See the link below for detailed information.
Without a license, yes.
Fernando Cento was born in 1883.
Fernando Cento died in 1973.
Cento piccole mamme was created in 1951.
Pieve di Cento's population is 6,959.
Cento giorni a Palermo was created in 1984.
Cento anni d'amore was created in 1954.
Yes. Editing an existing image (no matter how much/little) does not void the original creators copyright and without permission is still considered infringement.
The duration of Cento giorni a Palermo is 1.78 hours.
Depending on how "thinly veiled" it could be judged an infringement of both a copyright and trademark.
Copying, altering, distributing, or performing/displaying the file without permission from the copyright holder or an exemption in the law would be considered infringement.
Cento- n. pl. A literary work pieced together from the works of several authors.