Gatsby's mansion symbolizes two broader themes of the novel. First, it represents the grandness and emptiness of the 1920s boom: Gatsby justifies living in it all alone by filling the house weekly with "celebrated people." Second, the house is the physical symbol of Gatsby's love for Daisy. Gatsby used his "new money" to create a place that he thought rivaled the houses of the "old money" that had taken her away.