Sulphur Baths, Split
I am not sure if there excist any other Secession building in Split besides Sulphur baths in Marmontova street. This construction was built in the very beginning of the 19th century and is fine example of the Art Nouveau style in Split. It is designed by a local architect who studied in Vienna and came back home "infected" by the Secession.
The spa is still working (its smell could be feel for milles around) and serve as an rehabilitation center for various rheumatic problems.