The First Style, also known as the Incrustation Style, refers to a decorative painting technique that emerged in ancient Rome around the late 2nd century BCE. This style is characterized by its use of plaster to mimic the appearance of expensive materials like marble and colorful stones, creating an illusion of luxury and sophistication in domestic spaces. The First Style is significant for its role in the evolution of Roman wall painting, reflecting both aesthetic preferences and social aspirations of the time.