Villa Hakasalmi (Finnish: Hakasalmen huvila, Swedish: Villa Hagasund), also known as Villa Karamzin, is an architecturally and historically important 19th-century villa located in the Etu-Töölö district of central Helsinki, Finland. The villa is situated in a prominent position on Mannerheimintie, next to Finlandia Hall and opposite the National Museum. Designed by architect Ernst Lohrmann in the Empire style and built in 1844–1846, the villa was originally the summer residence of Senator and State Councillor Carl Johan Walleen.

https://en.wikipedia.org/wiki/Villa_Hakasalmi