Retz has two landscapes. Above ground, its wide square and windmill make a familiar Weinviertel scene; below, cellars cut through old marine sand tell a harder story about storage, money and cross-border trade. The tunnels did not exist to amuse visitors. They helped merchants mature and move wine from this Lower Austrian town towards markets to the north.
A market over the sand
The municipal history describes an older settlement called Rezze and a planned town that grew in the late thirteenth century near routes towards Znojmo and the Thaya valley. The account treats the precise course of those early routes as probable. It does not supply a Roman or other classical foundation, and one should not invent one. Retz acquired a large market square, gates and walls; a 1458 privilege from Emperor Frederick III strengthened the trade in salt, grain and wine. Hussite forces entered in 1425 and burned much of the town, which was rebuilt. Later prosperity left Renaissance houses around the square.
The city's account of its cellars explains why they grew: easily excavated sand and a stable cool temperature suited wine storage. Some passages run beneath property boundaries; the total network has never been fully measured. Estimates of its length are therefore estimates, not a precise engineering fact. The same source describes how older exclusive trading rights weakened when freer commerce spread to surrounding villages. Wine growing, trade and visits to the cellar system remain part of the local identity, alongside ordinary town services.
From square to wind
A useful visit begins on Hauptplatz, looks at the Verderber and Sgraffito houses, then goes underground on a bookable cellar tour. Finish uphill at the windmill: the municipality explains that wind power answered a shortage of suitable watercourses for mills in western Weinviertel. The city offers tours of the still-operational grain mill; check the season before going. Statistics Austria counts 4,169 residents in the municipality on 1 January 2026, not just in the walled centre. ÖBB's Nordwestbahn timetable shows Retz between Vienna, via Stockerau, and Czech Znojmo. Check current cross-border trains, cellar bookings and windmill opening before setting out. The sequence from rail station to square to sand makes the town's economy visible rather than merely picturesque.