jugendstil and his son liberty, are 2 schools of art born between XIX and XX centuries in europe in particular in the german region. Wien is the most important city for these schools (but it was born in Munchen), their partecipant wanted to have a sharp cut from the mainstream school (jugendstil=young style). they are at a first look quite similar to art nuveau and art deco, but more related to nature. one of his master (in visual art) is Alphonse Mucha, but what I prefer most is the architecture style and decoration of jugendstil. Sorry but I can't found any english page with a good explanation og jugendstil, but if you search for images with googles there are come good examples. cheers