What is commonly the shape of artwork referred to as a tondo?

A tondo is a specific type of artwork that is characterized by its circular shape. This format has its roots in the Italian Renaissance and has been used for various types of representation, including paintings and reliefs. The round shape is often associated with the human figure and can convey a sense of harmony and balance. This artistic convention allows for a unique framing of subjects, often seen in works where the circular format enhances compositional elements or thematic significance. As such, recognizing a tondo as circular is essential to understanding its historical context and aesthetic implications in the field of visual arts.