MS Stockholm was a passenger ship that was constructed as a transatlantic ocean liner for the Swedish American Line, and later rebuilt into a cruise ship. Stockholm is best known for the accidental collision with the Andrea Doria in July 1956, which resulted in the sinking of the Italian liner with 46 fatalities off the coast of Nantucket, Massachusetts.

During her seven decades of service, she passed through several owners and sailed under the names Stockholm, Völkerfreundschaft, Volker, Fridtjof Nansen, Italia I, Italia Prima, Valtur Prima, Caribe, Athena, and Azores before beginning service as Astoria in March 2016. Astoria sailed with Cruise & Maritime Voyages until the company ceased operations in 2020 due to the COVID-19 pandemic. After being laid up for several years in Rotterdam, the historic vessel was finally sold for scrap in June 2025. On 4 July 2025, Astoria was towed from Rotterdam to Ghent for recycling.

The ship was ordered in 1944, and launched 9 September 1946, as Stockholm by Götaverken in Gothenburg for the Swedish America Line (SAL). The ship was designed by Swedish American Line designer, Eric Christiansson, who worked as the technical director at parent company Broström. She was the fourth ship named Stockholm for Swedish American Line, but the second of the four to actually sail under the name (See: MS Stockholm (1941)). When Stockholm III was sold to the Italians, the proceeds were initially left aside, but were later used to finance the construction of the ship after the 1941 Stockholm was sunk during the war.

At 525 feet (160.02 m) with a gross register tonnage of 12,165, Stockholm at the time was the smallest passenger ship operating on the North Atlantic route, but the largest passenger ship built in Sweden, with the largest diesel propulsion unit yet built in Sweden. Originally designed to carry a total of 395 passengers, divided between first and tourist class, and a cargo capacity of 3,000 tons. Interiors were completed by Swedish artists, including Kurt Jungstedt. When delivered, the ship would replace the aging SS Drottningholm, and run an alternating transatlantic service with MS Gripsholm. She made her maiden voyage on 21 February 1948, under the command of Captain Waldemar Jonsson, from Gothenburg arriving in New York on March 1.

The Stockholm would continue to sail the transatlantic route, later joined by the new MS Kungsholm (1952). A 1953 refit expanded Stockholm's capacity to 548 people by infilling the outdoor aft and forward end of "A" Deck with passenger cabins. Due to the small size, and not handling the North Atlantic seas very well during the colder months, the Swedish American Line scheduled her for occasional cruises starting in 1953 out of Morehead City, North Carolina cruising to Havana, Nassau, and Bermuda. In February 1955, she was used to deport Arne Pettersen, the last person to go through Ellis Island, to Gothenburg, Sweden. A later refit in 1956-57 added a cinema to the deck forward end of the main superstructure, and an outdoor pool aft.

With both MS Kungsholm and the new MS Gripsholm (1957) sailing, the smaller Stockholm was started to be seen as too small and not meeting the current standards of the line. The ship was sold in May 1959 to, at the time, an unidentified German company. The ship would finish out the year sailing with Swedish American Line to New York, before being transferred in 1960 to the new company.

On the night of 25 July 1956, at 11:10 p.m., in heavy fog in the North Atlantic Ocean off the coast of Nantucket, Stockholm and Andrea Doria of the Italian Line collided in what was to become one of history's most notorious maritime disasters.

Although most passengers and crew survived the collision, the larger Andrea Doria luxury liner capsized and sank the following morning. Flooding from the collision caused Andrea Doria to list 18 degrees to starboard within minutes, quickly rendering 50% of her lifeboats unusable. However, a number of ships, including SS Ile de France, responded and provided assistance, which averted a massive loss of life.