Heorot is a grand mead hall described in the Old English epic poem, Beowulf. It was built by King Hrothgar of the Danes and serves as a gathering place for warriors and a symbol of his power and prosperity. The hall is known for its impressive architecture, featuring a high roof and large wooden beams, and it is adorned with gold and other treasures. The hall becomes a target for the monster Grendel, who terrorizes the inhabitants and disrupts their celebrations. Heorot represents community, strength, and the challenges faced by the Danes, highlighting themes of heroism and the struggle against evil in the poem.