I want to know the answer to the following question:
what was built in the 1920's and 1930's
All the background I'm provided with is that "During this period, several Jugendstil houses and office buildings were built, followed by Rietveld who built the Rietveld Schröder House (1924), and Dudok's construction of the city theater (1941).". Is that enough to answer the question?