More than a century after first-class passengers aboard the ill-fated Titanic ate grilled mutton chops and custard pudding in an elaborate dining room, the ship's last luncheon menu is expected to fetch up to $70,000 in an online auction, a curator said on Monday.

The luxury cruise liner sank in the Atlantic Ocean on April 15, 1912, after striking an iceberg during its maiden voyage from Southampton, England, to New York.

Tuesday marks 30 years since the wreckage of the ship, which had been dubbed unsinkable, was discovered on the ocean floor by a team of researchers.