Meduseld was the great Golden Hall built in Edoras.
Meduseld was a large hall with a straw roof, which made it appear as if it was made out of gold when seen from far off. Its walls were richly decorated with tapestries depicting the history and legends of the Rohirrim, and it served as a house for the King and his kin, a meeting hall for the King and his advisors, and a feast hall.
The word Meduseld, in the Old English, means "Mead Hall" having a connotation of "Hall of feasts"; medu means "mead" but as a word it has connotations to "joy".
In many ways Meduseld is inspired by Anglo-Saxon poetry, particularly Beowulf, which contains the mead-hall Heorot. The description of "the light of it shines far across the land" is one of the lines from this poem.