The Olympic-class ocean liners were built by Harland & Wolff for the White Star Line. The class included three ships: RMS Olympic, RMS Titanic, and HMHS Britannic. Olympic was launched in 1910 and served from 1911 to 1935, known for her luxury and durability, earning the nickname "Old Reliable". Titanic, launched in 1911, sank on her maiden voyage in 1912 after hitting an iceberg, leading to significant maritime safety changes. Britannic, launched in 1914, served as a hospital ship during World War I and sank in 1916 after hitting a mine. These ships were the largest and most luxurious of their time, featuring advanced technology and opulent accommodations.