Weinhofmeisterei Mathias Hirtzberger produces wines from the Wachau, Austria's steep-terraced riverside region in Niederösterreich. The winery focuses on the two grapes that define the area: Riesling and Grüner Veltliner, both vinified in the Smaragd style—the region's designation for dry, fully ripe wines of maximum concentration. The Kollmitz Smaragd Riesling and Kollmütz Grüner Veltliner Smaragd represent the winery's core expression, mineral-driven and structured wines built for aging. A third flagship, the Bach Riesling Smaragd, extends the portfolio across distinct vineyard sites. These wines have been assessed by Falstaff, Wine Spectator, Wine Advocate, Decanter, and Wine Enthusiast, reflecting their standing within serious wine criticism. The Wachau's combination of Alpine influence, slate soils, and steep south-facing slopes yields Rieslings of piercing acidity and white wines of uncommon depth—a character evident in Hirtzberger's range.