Austria-Hungary broke apart in 1918 and Pezinok woke up in Czechoslovakia. For the German families who had sat on the town council and run the wine trade for centuries this was a reversal: they were suddenly a small minority in a republic whose official languages were Czech and Slovak, and the Hungarian officials above them were gone too. The wine trade began to reorganise itself, with growers selling more and more through co-operatives instead of family by family. The Slovak wine co-operative later took over the castle cellars and fitted them out between 1940 and 1943 — the same cellars under the castle in which visitors are poured wine today.Rakúsko-Uhorsko sa v roku 1918 rozpadlo a Pezinok sa zobudil v Československu. Pre nemecké rodiny, ktoré po stáročia sedeli v mestskej rade a držali obchod s vínom, to bol obrat: zrazu boli malou menšinou v republike, ktorej úradnými jazykmi boli čeština a slovenčina, a maďarskí úradníci nad nimi zmizli tiež. Obchod s vínom sa začal preskupovať, vinohradníci predávali čoraz viac cez družstvá a nie každý sám za seba. Slovenské vinohradnícke družstvo neskôr prevzalo zámocké pivnice a v rokoch 1940 – 1943 ich prispôsobilo svojim potrebám — je to ten istý pivničný systém pod zámkom, v ktorom sa dnes nalieva návštevníkom.
