Short answers, pulled from the story.
Giulio Clovio, born Juraj Julije Klović, was a Croatian-Italian illuminator, miniaturist, and painter active mainly in Renaissance Italy. He is considered by many historians to be the greatest illuminator of the Italian High Renaissance.
Giulio Clovio died in Rome on the 5th of January 1578. He was buried in the Basilica of San Pietro in Vincoli, the same church that holds Michelangelo's statue of Moses.
Giulio Clovio's most famous work is the Farnese Hours, a prayer book completed in 1546 for Cardinal Alessandro Farnese after nine years of work. It is now held at the Morgan Library in New York City.
Giulio Clovio was born in Grižane, a village in the Kingdom of Croatia, in what is today Croatia. He moved to Italy at the age of eighteen and spent most of his career there.
Giulio Clovio was a close friend of the much younger El Greco during El Greco's early years in Rome. El Greco painted two portraits of Clovio, one placing him alongside Michelangelo, Titian, and Raphael as one of his four masters.
Giulio Clovio earned the nickname Michelangelo of the miniature for his skill in transferring the style of Italian High Renaissance painting into small illuminated manuscripts. His books became famous largely because of the quality of his illustrations.