In the middle of the century, Saint Mary's Church was built, and in the 1370s the building of the fortress at Korsholm, Crysseborgh, was undertaken, and served as an administrative centre of the Vasa County.
A mediados do século construíuse a igrexa de Santa María, e en 1370 o forte de Korsholm, o Crysseborgh, foi tomado e serviu como centro administrativo do Condado de Vaasa.