Two Villages, One Hill
The site is recorded as two adjacent bodies of vineyard land roughly 700 metres apart, the larger about 43 hectares, the smaller about 33. The split is administrative rather than geological. The larger share lies in the cadastral village of Hütteldorf, the smaller in Trasdorf, and both belong to the market municipality of Atzenbrugg in the Tulln district. The Hütteldorf in question is the Lower Austrian settlement of some 115 residents west of Heiligeneich, not the Vienna district that shares the name, and a producer bottling from the site, Weingut Kopp, is based there. Read as a single hill, Altenberg accounts for roughly 76 hectares under one name, a considerable figure in a region totalling around 800 hectares.
From Wagram to Traisental
The 2015 amendment to Austrian wine law moved Atzenbrugg and Würmla eastward out of Wagram and into the Traisental, on grounds of geographic proximity. Atzenbrugg now functions as a permitted village name within the Traisental DAC origin pyramid, and current bottlings read Traisental DAC Atzenbrugg Ried Altenberg. Older references placing the site in Wagram are not mistakes so much as fossils of the previous boundary, which is worth knowing when reconciling labels, maps and merchant listings that disagree.
No ÖTW classification attaches here. The association's classified Traisental sites, among them Alte Setzen, Berg, Hochschopf, Pletzengraben, Rothenbart and Zwirch, all sit upstream nearer the Traisen itself, and the association's membership in the region is concentrated on estates outside Atzenbrugg. Altenberg is an unclassified site farmed by small growers.
Loess, Not Limestone
The Traisental built its reputation on calcareous gravel and conglomerate, which give the region's Grüner Veltliner its characteristic tautness and stony, faintly saline finish. Altenberg departs from that template. It sits where the Perschling valley opens into the Tullnerfeld, close to the Danube, and here deep loess dominates the profile.
That substitution matters more than the appellation does. Loess holds water where conglomerate sheds it, and growers on the site credit that reserve with carrying the vines through the heat of 2018 without stress, assisted by an exposure that stops short of full south. The position also collects two air masses: Pannonian warmth pushing up off the plain, alpine coolness drawn down the valley, a combination that lengthens the aromatic development without stripping acidity.
The wines follow the soil rather than the region. Altenberg Veltliner tends broader, rounder and more overtly spicy than limestone-grown Traisental, closer in build to what the neighbouring Wagram produces, which is precisely what the geology predicts given where the boundary used to fall.
The Wines and Their Growers
Grüner Veltliner is effectively the site's whole business, consistent with a region where the variety occupies more than sixty percent of plantings. Bottlings show apple and citrus fruit, white pepper, a lively rather than austere line, and moderate phenolic grip, with reviewed examples landing in the high eighties to around ninety points at Falstaff.
Winzerhof Altmann in Trasdorf, run by Matthias Altmann since his first bottling in 2007, works about three and a half hectares without herbicides or synthetic fertiliser and labels an Altenberg simply as Löss. Weinbau Resch, also in Trasdorf, bottles the site alongside its Buschenschank trade. Weingut Kopp in Hütteldorf offers both an Altenberg vom Löss and an Atzenbrugg village designation from the same hill.
Detailed survey work on the site remains unpublished. Elevation range, subsoil variation and parcel-level distinctions are not documented in any public source, and anyone claiming precision beyond the loess is extrapolating.