The traditional winery is located in the village of Mailberg northeast of Hollabrunn in the Lower Austrian wine growing region Weinviertel near the Czech border. The first documented mention dates back to 1055. 1140, the Order of St. John (later the Sovereign Order of Malta) was given land with vines in "Mourberg". In 1969 Laurenz Moser III. (1905-1978) from Rohrendorf leased the vineyards belonging to the Kommende Mailberg of the Order of Knights of Malta. Since then it has belonged to the company Lenz Moser AG with its head office in the community of Rohrendorf (Lower Austria). Laurenz Moser III had the vineyards completely replanted and extended them to their present size.
His son Laurenz Moser IV. propagated environmentally conscious cultivation on a large scale as early as 1978 and had ecological comparative trials carried out in the castle vineyard in Mailberg. Two dissertations at the University of Natural Resources and Applied Life Sciences formed the basis for the continuous conversion of the Mailberg facilities to KIP (Controlled Integrated Production) and Integrated Pest Management. These include organic fertilization and natural pest control. Under the direction of Lenz Moser IV, the first experiments with barrique ageing in Austria with red wines from Mailberg were also undertaken from 1978 onwards. As a result of his efforts, the Cabernet Sauvignon variety was planted here for the first time in Austria in 1982.
Norbert Gutmayer acts as administrator in Mailberg. The vineyards comprise 50 hectares of vines, including the Hundschupfen reed. They are planted with the main varieties Grüner Veltliner and Blauer Zweigelt, as well as Sauvignon Blanc, Chardonnay, Cabernet Sauvignon, Merlot and Blauer Burgunder(Pinot Noir). The guiding principle of the Order of Knights has always been "Optimus quisque" (Simply the Best) and this goal has also been set for the wines. All red wines undergo and then mature partly in large wooden barrels and partly in barriques. Grüner Veltliner and Chardonnay are always fermented at a low temperature and matured in stainless steel. Premium wines include "Malteser " (Grüner Veltliner), "Grüner Veltliner Hundschupfen", "Malteser Merlot" and the red wine cuvée "Malteser Kommende Mailberg" (Cabernet Sauvignon, Merlot). Around 200,000 bottles of wine are produced annually. The winery is a member of the winegrowers' associations Mailberg Valley and premium wine estates Weinviertel.