The Rosarium was built in the 1960s and since then the whole park is also in the possession of the municipality of Baden. During the year 2013 a big part of the Rosarium was redeveloped.
On an area of over 90.000 m² you can find approx. 600 different kinds of roses. The best time to enjoy the flowerage is in June or in October. But also during the summer time you can find many roses in full bloom.