The museum's function comprise the coastline and northern area of the former Vaasa province. The collections relate to both peasant and upper-class culture, the history of the town of Vaasa and Ostrobothnia. There are for example the coin collection of Mauritz Hallberg, the Hedman collection of visual and industrial art from different countries, mostly Dutch and Italian, the oldest dating from the 15th century. The Finnish art collection is from the 19th and 20th centuries.
Terranova-Kvarkens Nature Centre is also located to the same building. It exhibits fauna and geology of the Kvarken area, the landrising and the ice age, information in nature tourism and contacts also information in the Forest and Park Services, virtual aquarium, natural history collections of Ostrobotnia Australis, Wildlife Nature Film Festivals.
The Temple of Portunus or Temple of Fortuna Virilis ('manly fortune') is one of the best preserved of all Roman temples. Its dedication remains unclear, as ancient sources mention several temples in this area of Rome, without saying enough to make it clear which this is.
The temple was originally built in the third or fourth century BC but was rebuilt between 120-80 BC, the rectangular building consists of a tetrastyle portico and cella, raised on a high podium reached by a flight of steps, which it retains.
The temple owes its state of preservation to its being converted for use as a church in 872 and rededicated to Santa Maria Egyziaca (Saint Mary of Egypt). Its Ionic order has been much admired, drawn and engraved and copied since the 16th century. The original coating of stucco over its tufa and travertine construction has been lost.