Swedish divers in diving bells brought up some of "Vasa"'s cannons from the sunken ship in the 1660s. Anders Franzén found "Vasa" in 1956 after he had read about the ship in sources and looked for her in the water around Stockholm. The ship was brought up in 1961 and was then treated with special chemicals so that it would last for a long time. The preservation treatment took almost 20 years to complete. "Vasa" is now in the Vasa Museum in Stockholm, Sweden. It is a very popular place for tourists to visit. It gets more than one million visitors every year.