Why exactly does Beowulf want a tower built for him?

Beowulf requests a tower to be built for him as a final resting place to ensure that his legacy is remembered after his death. The tower, which he envisions on a cliff by the sea, symbolizes his heroic status and serves as a monument to his achievements, allowing sailors to recognize and honor him. This desire reflects the importance of reputation and remembrance in the culture of the time, highlighting Beowulf's commitment to leaving a lasting impact on his people.