Country landscape with a rainbow.

The rainbow—a meteorological event of brief duration and vivid color—was a subject that tested landscape painters' ability to capture transient natural phenomena. Agersnap's country landscape with a rainbow brings together the typical Danish countryside (open fields, gentle slopes, patches of vegetation) with a prismatic arc that momentarily transforms the scene. The rainbow carries symbolic associations from the Biblical tradition, though by the Post-Impressionist period it functioned primarily as a naturalistic and atmospheric challenge. The work demonstrates Agersnap's interest in recording specific weather conditions rather than generalized landscape types.

Painting a rainbow requires rendering color transition across a curved band while maintaining its translucent quality against the storm-lit sky behind. Agersnap would have used thin, graduated color application or wet-into-wet blending to achieve the spectral progression without hard edges.