He was born in Hungary and emigrated as a boy to Vienna, where he was trained as a history painter at the Vienna Academy of Fine Arts under the orientalist Leopold Karl Müller. He joined the Visual Artists Cooperative and became friendly with Gustav Klimt, before Klimt departed to form the Vienna Secession.
Hiremy-Hirschl had a promising start to his career, with Salon honors, a scholarship to Rome, and travels to Egypt. But a scandalous love affair with a married woman ostracized him from the Viennese social circle, and he left to live in Rome.
Many of his works are concerned with a sublime and sensual decadence. For example, the painting Ahasuerus at the End of the World, (1888) shows the legendary Wandering Jew as the last man in the polar desert, caught between the angel of Hope and the spectre of Death. Before him lies a fallen female figure, the personification of Dead Humanity, surrounded by grisly crows.
In 1898 he painted Souls on the Banks of the Acheron ("Die Seelen des Acheron" Austrian Gallery, Vienna.) Click the image to enlarge.
The mythological figure of Hermes Psychopompos stands at the edge of the river of the dead, facing a throng of recently deceased souls who implore him to save them from the last trip to Hades.
A 1984 essay* by Gert Schiff says:
“They are all in a state of extreme agitation; only a few children and a couple petrified by despair do not share in the general frenzy. The figures are crowned with roses and daffodills and have the dishevelled look of bacchantes in ecstasy…There is an aesthetic of horror as well as an aesthetic of hedonism."
*Schiff’s essay is from an exhibition catalog “Adolf Hiremy-Hirschl: The Beauty of Decline,” Roger Ramsay Gallery, 1984.
More samples of his work on Deviant Art, link.
Additional biographical material at Humrich Fine Art, link.
More on Wikipedia about the Wandering Jew legend and the Acheron.