St. Stephen's Cathedral in Vienna (1832 version)

St. Stephen's Cathedral in Vienna (1832 version), now in the Belvedere, is one of Alt's most definitive treatments of the Stephansdom — the building he returned to more often than any other throughout his career. The 1832 canvas version, on a more prestigious support than paper, represents Alt committing the subject to a format appropriate for major collection display rather than portfolio study. The Belvedere, which holds the definitive collection of Austrian art from the Baroque to the modern period, acquired this work as a cornerstone document of Biedermeier Vienna. By 1832, Alt's architectural watercolour technique had been fully established and this canvas version translates that mastery into oil while retaining the precision and atmospheric sensitivity of his preferred medium.

Canvas support gives this Stephansdom view a painterly depth unavailable in watercolour: Alt can build the sky in multiple glazed layers, achieve the warm tonality of stone in afternoon light through oil's rich pigment load, and give the tile roof its maximum colouristic complexity. The transition from canvas to oil reveals Alt consciously competing with his own watercolour standard.