Valerian galjamini's painting of helsinki's päävartiontor and kauppatori seen from katajanokka. The picture shows, among other things, the merchant heidenstrauch's house (today's presidential palace) and on the left the senate house (today's state council castle), with an old bell tower in the yard. The work is owned by the helsinki city museum. Object Type: painting. Date: 1827. Medium: watercolor.