The Headquarters MuseumThe Headquarters Museum is part of the Muisti Centre of War and Peace. It showcases the Commander-in-Chief Marshall Mannerheim and Mikkeli as the Headquarters city. Website museot@sivistys.mikkeli.fi +358 40 129 5090 Location: Ristimäenkatu 4 50100 Mikkeli Pricing: More information at https://www.visitmikkeli.fi/en/palvelut/the-headquarters-museum-in-mikkeli