Helgeandsholmen is a small island in central Stockholm. Together with Riddarholmen, it forms Gamla Stan, the old town of Stockholm.
The terrace in the eastern end is called Strömparterren. It was Stockholm’s first public park, opened in 1832 to the general public, with whom it quickly found favour. There was a café, and concerts were often arranged in the park. It's said that in those times there were clear class differences between the parks of Stockholm. Humlegården was for the common people, Kungsträdgården for the “beau monde”. Strömparterren seems to have been a place where everyone could go. :)