A museum in Wales said it has authenticated three paintings by the English landscape painter J.M.W. Turner that had been considered fakes. The works are being featured in a new display at the National Museum Cardiff that opened to the public this week.

The works in question were bequeathed to the museum starting in 1951 by the collectors Gwendoline and Margaret Davies. The sisters donated the paintings as part of a group of seven works, all of which were believed to be authentic at the time. But dealers soon started expressing doubts about some of them, according to the museum.

The newly authenticated works — "The Beacon Light," "Margate Jetty" and "Off Margate" — depict misty seascapes. The museum said the paintings were examined by art experts. It said the paintings were also featured on the BBC's "Fake or Fortune," a reality-type show that examines the provenance of works of art.

"J.M.W. Turner: The Davies Collection" is on display at the National Museum Cardiff through Jan. 20.