lake Nemi with view on Castel Gandolfo and the Campagna

Oswald Achenbach's view of Lake Nemi — the volcanic crater lake in the Alban Hills south of Rome, known as 'Diana's Mirror' in antiquity — with Castel Gandolfo and the Roman Campagna visible beyond, belongs to his extensive production of Italian landscape subjects. Achenbach was the leading German painter of Italian light, and Lake Nemi, with its mythological associations (the shrine of Diana Nemorensis nearby), its deep still water reflecting sky and surrounding forest, and its view over the Campagna toward Rome, was one of the most storied landscape subjects in European painting.

The composition balances the deep reflecting surface of the lake against the receding aerial perspective of the Campagna. Achenbach's handling of southern Italian light — warm, clear, with deep shadows under trees — is confident and authoritative. The palette is warm and luminous, the sky rendered with careful gradation.