Ormrinn langi

It was built for the Norwegian King Olaf Tryggvason, and was the largest and most powerful longship of its day.

When he was traveling north to Hålogaland, he ended up in battle with forces of Raud the Strong, who refused to convert to Christianity.

Olaf eventually captured Raud, and gave him two choices: convert or die.

Extrapolating from archeological evidence (e.g., the Gokstad ship), this would make Ormen Lange nearly 45 metres (148 ft) long.

Ormen Lange was the last ship to be taken in the Battle of Svolder, where Olaf was killed (although his body was never found—some stories tell of the king jumping into the water either sinking due to the weight of his armour or escaping in the confusion) by a coalition of his enemies in the year 1000.