1931 and 1935, the island was excavated under the direction of Karl Keller-Tarnuzzer. Numerous items such as stone axes, arrowheads, a flint sickle,...

1882-83 by Schenk was followed by a second expedition in 1931-36 by Karl Keller Tarnuzzer. There was a smaller excavation in 1962 around the St. Otmars Chapel...