St. Stephen's Cathedral in Vienna (circa 1831 version)

St. Stephen's Cathedral in Vienna (circa 1831 version), a watercolour from 1831 in the Imperial Furniture Museum, Vienna, is the earliest of several versions Alt produced of this subject throughout his career. The Stephansdom — Vienna's Gothic cathedral with its distinctive coloured-tile roof — was the most symbolically charged architectural subject an Austrian painter could choose, and Alt returned to it repeatedly as if testing how his increasing mastery could yield new versions of the same building. At twenty-two, when he painted this version, Alt had recently returned from his first Italian journey and was applying the architectural precision he had developed abroad to the most familiar building in his home city. The Imperial Furniture Museum's collection, which focuses on the material culture of the Habsburg court, holds this work as a document of early Biedermeier Vienna.

Watercolour on paper is Alt's primary medium and the 1831 Stephansdom exemplifies his technique in its early maturity: structural pencil underdrawing, precise architectural washes in Payne's grey and ochre, and transparent sky washes applied wet-on-dry to maintain crispness. The distinctive diamond-pattern tile roof is rendered with individual tile marks rather than a generic texture.