Until the construction of the FrobozzCo Building, the Underground Revenue Service's main office in Flatheadia was the largest structure in the Empire. Here, thousands upon thousands of accountants and auditors once sat, tabulating the proceeds from Dimwit Flathead's astronomical taxations. This building, along with the entire village of Flatheadia, was destroyed by the Curse of Megaboz in 883 GUE.

SOURCE(S): Zork Zero