Wolfgang Rihm’s Fifth String Quartet poses numerous challenges to analysis because it contains little repeated material, no clear formal design, and contains a wealth of diverse musical gestures. I argue that the piece’s gestures should be understood in relation to an idealized Austro-German romantic music, common to much of Rihm’s work from the 1970s, but which fails to materialize in the Fifth Quartet. I trace the piece’s closeness to romanticism and demonstrate how the piece’s unpredictable formal process produces a large-scale gestural contour composed of smaller processes. I call processes directed toward romanticism, “becoming,” and those directed away from it, “disintegrating.” After surveying several noteworthy passages, I examine the quartet’s large-scale form. I conclude with a brief meditation on the relationship between Rihm’s aesthetics and German romanticism and the post-modernism of the 1970s and 1980s, and argue that Rihm’s music fulfills the demands of romantic theorists from the early 19th century, forming a new strain of romanticism built atop the ruined memories of the old.