The World Heritage Convention obligates the Finnish government to see to it that Suomenlinna remains in an optimally authentic condition. The basis of the plan for the use of Suomenlinna is that the appropriate use of the fortress will secure its preservation for posterity.
The World Heritage Site is restored, maintained and governed by the Governing Body of Suomenlinna that operates under the Ministry of Education and Culture.
As the site manager of the UNESCO World Heritage Site, the Governing Body of Suomenlinna is responsible for preserving the monument and associated historical and architectural values for future generations, too.
A new management plan was completed at the end of 2019. The plan was drawn up for Suomenlinna in cooperation with many partners.