Sigurd the Volsung (William Morris).
Having attained his full growth and the age of reason, Thor was admitted in Asgard among the other gods, where he occupied one of the twelve seats in the great judgment hall. He was also given the realm of Thrud-vang or Thrud-heim, where he built a wonderful palace called Bilskirnir (lightning), the most spacious in all Asgard. It contained five hundred and forty halls for the accommodation of the thralls, who after death were welcomed to his home, where they were treated as well as their masters in Valhalla, for Thor was the patron god of the peasants and lower classes.
“Five hundred halls
And forty more,
Methinketh, hath
Bowed Bilskirnir.
Of houses roofed
There’s none I know
My son’s surpassing.”
Sæmund’s Edda (Percy’s tr.).