Complex sentence: Probably completed from 1513 to 1516, when the High Renaissance was metamorphosing into Mannerism, it is believed to be his final painting and is now exhibited at the Musée du Louvre in Paris, France.
Split into simpler sentences: Probably completed from 1513 to 1516, when the High Renaissance was metamorphosing into Mannerism, it is believed to be his final painting. It is now exhibited at the Musée du Louvre in Paris, France.