In Matteusgården in Norrköping, the exhibition is shown for a couple of days and very many visitors came already during the first hours.

Clas Svahn is an international coordinator at UFO-Sweden and shows us around.

- We had printed 300 tickets, but they have already run out after a few hours.

A visitor pushes up to Clas to show off a stone that for centuries on his farm has been thought to come from space, hear what Clas thinks in the piece above.

Previously classified films have been released

Clas Svahn is one of those who will give lectures during the weekend in connection with the exhibition, among other things he will tell that the interest in objects from space has increased since the US Armed Forces released films from strange vessels seen, only this week there were hearings in the US Congress on UFO sightings.

- A year ago, the US military released a report with 144 cases from mainly American pilots who have seen strange vehicles, in only one of the cases has an explanation been found.

Below, Clas Svahn shows some of his favorite objects from the exhibition.

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Clas Svahn shows some favorite objects from the exhibition Photo: SVT / Carl Bruno Tersmeden

SVT Play has this documentary about the American UFO documents.