High Quality Content by WIKIPEDIA articles! The Olympic-class ocean liners were a trio of ocean liners built by the Harland & Wolff shipyard for the White Star Line in the early 20th century. They were Olympic, Titanic and Britannic. Although the three were the largest, most luxurious and above all safest of their time, two were lost early in their careers: Titanic sank on 15 April 1912 after hitting an iceberg in the North Atlantic, and Britannic sank on 21 November 1916, after hitting a mine laid by the German minelayer submarine U79 in a barrier off Kea during World War I. Olympic, the eldest sister and namesake of the class, had a long and illustrious career; she continued in service until she was laid up and scrapped in 1935, alongside Cunard`s RMS Mauretania.