April 15, 2012, will mark 100 years since the RMS Titanic sank after hitting an iceberg on its maiden voyage from Southampton, England, to New York City, killing more than 1,500 passengers and crew who drowned in the icy waters of the North Atlantic.
To commemorate the event, The Huffington Post is featuring historic photos from aboard the massive ship.
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One of the pictures features two men in the Titanic's gymnasium, one of whom was an electrician for Harland and Wolfe, the company that built the ship. The two men in the photo both died when the ship sank.
Another of the photos shows Robert Douglas Spedden, who was only 6-years-old at the time the Titanic sank. Although he survived the disaster, he was killed several years later after being hit by a car in Maine, according to Green-Wood Cemetery in New York, where he is buried.
According to the New Yorker, it took three years and five thousand men to build the Titanic in Belfast, Ireland. A cable that appeared in The New York Times on April 9 called the ship the "largest vessel in the world."
Click here to read about the Seamen's Church Institute, an unplanned -- and perhaps the first -- memorial to the victims of the Titanic.
Check out historic photos of the Titanic below: