This article explores Schubert's distinctive handling of the period theme-type, focusing on a particular kind of period that appears often in his Lieder: the idyllic period. Schubert's idyllic periods are characterized by their symmetry, diatonicism, transparent voice-leading structure, simple piano texture, and association with poems about nostalgia and hopefulness. I analyze three representative idyllic periods in Schubert's late songs: "Am Meer" (looking not only at the song itself, but also at its relation to the other Heine Lieder from Schwanengesang), "So lasst mich scheinen," and "Am Fenster." Collectively, these analyses reveal the diverse but related expressive connotations of this theme-type in Schubert's music. Moreover, they suggest that Schubert's musical evocations of naïveté and innocence demand as much scrutiny as his most radical experiments with tonality and form.