The dozens of self-portraits by Rembrandt were an important part of his oeuvre. Rembrandt created approaching one hundred self-portraits including over forty paintings, thirty-one etchings and about seven drawings; some remain uncertain as to the identity of either the subject (mostly etchings) or the artist (mostly paintings), or the definition of a portrait.
This was an enormously high number for any artist up to that point, and around 10% of his oeuvre in both painting and etching. By comparison, the highly prolific Rubens only produced seven self-portrait paintings. The self-portraits create a visual diary of the artist over a span of forty years. They were produced throughout his career at a fairly steady pace, but there is a gradual shift between etchings, more numerous until the 1630s, to paintings, which are more common thereafter. However, there is a gap in paintings between 1645 and 1652. The last three etchings date to 1648, c. 1651, and 1658, whereas he was still painting portraits in 1669, the year he died at the age of 63.
At one time about ninety paintings were counted as Rembrandt self-portraits, but it is now known that he had his students copy his own self-portraits as part of their training. Modern scholarship, especially the Rembrandt Research Project, has reduced the autograph count to over forty paintings, as well as a few drawings and thirty-one etchings, which include many of the most remarkable images of the group. The etchings are mostly informal, often playful tronies, studies of extreme facial expressions or portraits in what amounts to fancy dress; in several the clothes are the fashions of a century or more earlier. In others he is pulling faces at himself. His oil paintings trace the progress from an uncertain young man, through the dapper and very successful portrait-painter of the 1630s, to the troubled but massively powerful portraits of his old age. Together they give a remarkably clear picture of the man, his appearance and his psychological make-up, as revealed by his richly weathered face. To Kenneth Clark, Rembrandt is "with the possible exception of Van Gogh, the only artist who has made the self-portrait a major means of artistic self-expression, and he is absolutely the one one who has turned self-portraiture into an autobiography."