Aboa Vetus and Ars Nova is a museum in central Turku, Finland. The museum is housed in a building known as the Rettig palace, originally built in 1928. Aboa Vetus displays portions of the city dating back to medieval times, while Ars Nova is a museum of contemporary art.
The museum was first opened in 1995 as two independent museums. Originally, plans were for only Ars Nova, the contemporary art museum, but during its construction a number of structures and artifacts dating back to the Middle Ages were discovered, and the archaeological excavation that was commissioned eventually transformed into Aboa Vetus.