He was chosen as architect for the Bank’s Head Office in Finland’s first ever architectural competition, in 1876. The cornerstone was laid in 1879.
In accordance with tradition, a tin box was hidden beside the cornerstone, containing 10 and 20 markka gold coins, 1 and 2 markka silver coins as well as the history of the founding of the Bank of Finland, written on parchment. The building was designed with a spacious upper hall, meeting rooms for the directors and other work amenities.