For a long time research was carried out on the island, because it was believed that it was the legendary center of the cult of Slavic tribe Veleti – Rethra. In 1969, during archaeological excavations carried out under the direction of the German archaeologist Adolf Hollnagel, two cult figures of oak wood were discovered in the layer dated to the 11th-12th century. The first, 1.78 meter high, shows two male busts with large eyes, noses and mustaches in headgear (helmets?) placed on a column. The second figure, measuring 1.57 meter, shows a female figure with clearly marked breasts. According to the researchers, this finding can confirm the existence of the cult of twin deities in the Slavic mythology (see Lel and Polel).
