It's been 105 years since the most famous cruise ship of all time, the RMS Titanic, sank. The construction of the ocean liner was ordered by the White Star Line company, and it was built by the Harlan-Wolf shipyard in Belfast. At the time, it was the largest and most luxurious passenger ship in the world and the first ocean liner to have a swimming pool on board. The Titanic sank on the night of April 14-15, 1912, after hitting an iceberg. The sinking of an unsinkable ship at the time is today one of the greatest maritime disasters in human history. Here are 20 fascinating facts about the Titanic.