Mannerism is a period of European art that emerged from the later years of the Italian High Renaissance around 1520. It lasted until about 1580 in Italy, when a more Baroque style began to replace it, but Northern Mannerism continued into the early 17th century throughout much of Europe. Stylistically, Mannerism encompasses a variety of approaches influenced by, and reacting to, the harmonious ideals and restrained naturalism associated with artists such as Leonardo da Vinci, Raphael, and early Michelangelo. Mannerism is notable for its intellectual sophistication as well as its artificial (as opposed to naturalistic) qualities.

The definition of Mannerism, and the phases within it, continue to be the subject of debate among art historians. For example, some scholars have applied the label to certain early modern forms of literature (especially poetry) and music of the 16th and 17th centuries. The term is also used to refer to some Late Gothic painters working in northern Europe from about 1500 to 1530, especially the Antwerp Mannerists—a group unrelated to the Italian movement. Mannerism also has been applied by analogy to the Silver Age of Latin.