In the early 1900's Wrocław, or should I call it Breslau as this concerns the German era, must have been a shopping paradise. Countless shop buildings in art nouveau style were built in the city centre. Many of them were in the hands of Jewish owners.
A notable number of them is still preserved or restored, there must have been many more - if you know what to look for you will easily recognize them.
Their most striking feature, in addition to art nouveau ornaments, are large shop windows not only on the ground floor but also on the first, second, or even third floor.
The best area to look for art nouveau architecture is around Rynek and Plac Solny, and in the adjacent streets on the western side of the old town, ul. Ruska, Kielbasnicza and Rzeznicza.
Former Schlesinger department store (1901) in ul. Rzeźnicza
Plac Solny with shop building on the corner to Rynek
Rynek: Art nouveau facade inserted among the older townhouses. The facade includes neorenaissance elements. Art nouveau is often mixed with other styles.
Another example in Rynek