Virgin of the Rocks in the context of "Prime version"

The Italian polymath Leonardo da Vinci (1452–1519) was one of the founding figures of the High Renaissance, and exhibited enormous influence on subsequent artists. Only around eight major works—The Adoration of the Magi, Saint Jerome in the Wilderness, the Louvre Virgin of the Rocks, The Last Supper, the ceiling of the Sala delle Asse, The Virgin and Child with Saint Anne and Saint John the Baptist, The Virgin and Child with Saint Anne, and the Mona Lisa—are universally attributed to him, and have aroused little or no controversy in the past. Ten additional works are now widely attributed to his oeuvre, though most have previously incited considerable controversy or doubt: the Annunciation, Madonna of the Carnation, The Baptism of Christ (with his teacher, Verrocchio), Ginevra de' Benci, the Benois Madonna, the Portrait of a Musician (with possible studio assistance), the Lady with an Ermine, La Belle Ferronnière, the London Virgin of the Rocks (with studio assistance), the Portrait of Isabella d'Este, and Saint John the Baptist.

Other attributions are more complicated. La Scapigliata appears to be attributed by most scholars, but some prominent specialists are silent on the issue. Salvator Mundi's attribution remains extremely controversial, and the extensive nature of the restoration may never allow a definitive resolution. The small number of surviving paintings is due in part to Leonardo's habit of disastrous experimentation with new techniques and his chronic procrastination, resulting in many incomplete works. It is thought that he created many more works that are now lost, though records and copies have survived for some.

Sfumato (English: /sfuːˈmɑːtoʊ/ sfoo-MAH-toh, Italian: [sfuˈmaːto]; lit. 'smoked off', i.e. 'blurred') is a painting technique for softening the transition between colours, mimicking an area beyond what the human eye is focusing on, or the out-of-focus plane. It is one of the canonical painting modes of the Renaissance. Leonardo da Vinci was the most prominent practitioner of sfumato, based on his research in optics and human vision, and his experimentation with the camera obscura. He introduced it and implemented it in many of his works, including the Virgin of the Rocks and in his famous painting of the Mona Lisa. He described sfumato as "without lines or borders, in the manner of smoke".

According to the theory of the art historian Marcia B. Hall, which has gained considerable acceptance, sfumato is one of four modes of painting colours available to Italian High Renaissance painters, along with cangiante, chiaroscuro, and unione.

The Portrait of a Musician is an unfinished painting by the Italian Renaissance artist Leonardo da Vinci, dated to c. 1483–1487. Produced while Leonardo was in Milan, the work is painted in oils, and perhaps tempera, on a small panel of walnut wood. It is his only known male portrait painting, and the identity of its sitter has been closely debated among scholars.

Perhaps influenced by Antonello da Messina's introduction of the Early Netherlandish style of portrait painting to Italy, the work marks a dramatic shift from the profile portraiture that predominated in 15th-century Milan. It shares many similarities with other paintings Leonardo executed there, such as the Louvre Virgin of the Rocks and the Lady with an Ermine, but the Portrait of a Musician is his only panel painting remaining in the city, where it has been in the Pinacoteca Ambrosiana since at least 1672. One of Leonardo's best preserved paintings, there are no extant contemporary records of the commission. Based on stylistic resemblances to other works by Leonardo, virtually all current scholarship attributes at least the sitter's face to him. Uncertainty over the rest of the painting arises from the stiff and rigid qualities of the body, which are uncharacteristic of Leonardo's work. While this may be explained by the painting's unfinished state, some scholars believe that Leonardo was assisted by one of his students.

La Scapigliata (Italian for 'The Lady with Dishevelled Hair') is an unfinished painting generally attributed to the Italian High Renaissance artist Leonardo da Vinci, and dated c. 1506–1508. Painted in oil, umber, and white lead pigments on a small poplar wood panel, its attribution remains controversial, with several experts attributing the work to a pupil of Leonardo. The painting has been admired for its captivating beauty, mysterious demeanor, and mastery of sfumato.

There is no real consensus on the subject, date, history, or purpose of the painting. It shows an unidentified woman gazing downward while her hair fills the frame behind her. Many theories regarding the subject have been proposed: that it is a sketch for an uncompleted painting of Saint Anne; a study for the London version of the Virgin of the Rocks or Leonardo's lost painting of Leda and the Swan; or a painting left deliberately unfinished for its aesthetic value.