Final answer:
Michelangelo has artworks in the Vatican that have been restored through a long restoration process. His famous frescoes on the ceiling of the Sistine Chapel were cleaned and repaired to bring back their original beauty.
Step-by-step explanation:
Michelangelo is the artist who has artworks in the Vatican that have been restored. In 1508, Pope Julius II asked Michelangelo to paint the ceiling of the Sistine Chapel in the Vatican. The restoration process for the ceiling frescoes started in 1979 and was completed in 1994, bringing back the original beauty of Michelangelo's masterpieces.