In working-class neighbourhoods, Art Nouveau was typically found in rental-apartment buildings, shops, schools, cafés, cinemas and so on, as opposed to the private residences of the middle classes.

Here, Art Nouveau was on display for even the least well-off to enjoy, in the form of shop windows, woodwork, stained-glass windows and other ornamentation.

A number of architects adopted this style, as did craftspeople such as joiners, goldsmiths, stonemasons and stained-glass artists.

Only a few examples of this working-class Art Nouveau have survived the pressures of city-centre development and major building projects. Look more closely, however, and you'll find them in the most unexpected of places, from the middle of a shopping street, with traffic thundering past, to quieter pedestrian areas.

A far cry from the "total Art Nouveau" of the bourgeois home, they bear witness to a philosophy that aimed to do two things: create architecture in tune with the times and tailor it to the needs and tastes of all social classes.