The empire vanished in the wake of the Great War, but Elisabeth (or "Sisi" as she is popularly called) remains the subject of great interest in Austrian and perhaps Hungary as well. I was in Vienna around the time of the centenary of her death, and saw plenty of souvenir images of her, including Sisi chocolates, that nearly rivaled the usual similar items for Mozart.
Although Elisabeth lived in the age of photography, her station in life made it imperative that painted portraits of her were made. Some of these are shown below.
Let's begin with photographs of the young Elisabeth to set the scene.
Now for a few paintings by unknown or lesser-known artists.
When Elisabeth was about 18 years old, not long after she married Franz Josef.
Probably posthumous. This, and several of the portraits below are dated the year of her death or the year after, and were likely derived from photographs in tribute to the departed empress. Let us know in a comment if any of these "posthumous" works were actually painted from life.
Now for portraits by noted artists.
An informal (private) portrait treasured by Franz Josef. This shows her famous, (obsessively?) long hair.
A possibly posthumous pastel portrait by the noted Munich portrayer of Bismarck and others.
Another possibly posthumous portrait, this by the important Hungarian portrait painter who later was very successful in England.
Yet another likely posthumous portrait. Benczúr was a leading Hungarian artist whose worth was recognized in Bavaria and Italy as well, but not so much beyond that part of Europe.