Dana is a painting by the Dutch artist Rembrandt, first painted in 1636, but later extensively reworked by Rembrandt, probably in the 1640s, and perhaps before 1643. Once part of Pierre Crozat's collection, it has been in the Hermitage Museum, in St. Petersburg, Russia since the 18th century.It is a life-sized depiction of the character Dana from Greek mythology, the mother of Perseus. She is presumably depicted as welcoming Zeus, who impregnated her in the form of a shower of gold. Given that this is one of Rembrandt's most magnificent paintings, it is not out of the question that he cherished it, but it also may have been difficult to sell because of its eight-by-ten-foot size. Although the artist's wife Saskia was the original model for Dana, Rembrandt later changed the figure's face to that of his mistress Geertje Dircx.

The reworking changed the positions of, among other things, the head, outstretched arm and legs of Dana. The painting has been considerably cut down. It has a hard-to-read signature with a date ending in "6", but this may not be genuine.It was seriously vandalized in 1985, but has been restored.

Rembrandt Harmenszoon van Rijn (, Dutch: [ˈrɛmbrɑnt ˈɦɑrmə(n)ˌsoːɱ vɑn ˈrɛin] (listen); 15 July 1606 – 4 October 1669), usually simply known as Rembrandt, was a Dutch Golden Age painter, printmaker and draughtsman. An innovative and prolific master in three media, he is generally considered one of the greatest visual artists in the history of art and the most important in Dutch art history. Unlike most Dutch masters of the 17th century, Rembrandt's works depict a wide range of style and subject matter, from portraits and self-portraits to landscapes, genre scenes, allegorical and historical scenes, and biblical and mythological themes as well as animal studies. His contributions to art came in a period of great wealth and cultural achievement that historians call the Dutch Golden Age, when Dutch art (especially Dutch painting), although in many ways antithetical to the Baroque style that dominated Europe, was extremely prolific and innovative and gave rise to important new genres. Like many artists of the Dutch Golden Age, such as Jan Vermeer of Delft, Rembrandt was also an avid art collector and dealer.

Rembrandt never went abroad, but he was considerably influenced by the work of the Italian masters and Netherlandish artists who had studied in Italy, like Pieter Lastman, the Utrecht Caravaggists, Flemish Baroque, and Peter Paul Rubens. After he achieved youthful success as a portrait painter, Rembrandt's later years were marked by personal tragedy and financial hardships. Yet his etchings and paintings were popular throughout his lifetime, his reputation as an artist remained high, and for twenty years he taught many important Dutch painters.Rembrandt's portraits of his contemporaries, self-portraits and illustrations of scenes from the Bible are regarded as his greatest creative triumphs. His self-portraits form a unique and intimate autobiography, in which the artist surveyed himself without vanity and with the utmost sincerity. Rembrandt's foremost contribution in the history of printmaking was his transformation of the etching process from a relatively new reproductive technique into a true art form, along with Jacques Callot. His reputation as the greatest etcher in the history of the medium was established in his lifetime and never questioned since. Few of his paintings left the Dutch Republic while he lived, but his prints were circulated throughout Europe, and his wider reputation was initially based on them alone.

In his works he exhibited knowledge of classical iconography, which he molded to fit the requirements of his own experience; thus, the depiction of a biblical scene was informed by Rembrandt's knowledge of the specific text, his assimilation of classical composition, and his observations of Amsterdam's Jewish population. Because of his empathy for the human condition, he has been called "one of the great prophets of civilization". The French sculptor Auguste Rodin said, "Compare me with Rembrandt! What sacrilege! With Rembrandt, the colossus of Art! We should prostrate ourselves before Rembrandt and never compare anyone with him!"