The grand, multi-level Leocald Opera House stood proudly in the Historical District of Estalle, an island city situated on the planet of Procopia. This building, dedicated to the art of opera, took its name from Leocald VII, a past Emperor of the Tapani sector revered as the guiding figure of Tapani opera. The facility provided its artists with three separate theaters, numerous rehearsal spaces, a dance school, and living quarters for resident performers. During the height of Capital Season, the Opera House frequently hosted two or even three simultaneous productions, with a reduced schedule during the remaining part of the year.
The campaign guide Lords of the Expanse, a 1997 publication by Paul Sudlow and Chris Doyle for West End Games' Star Wars: The Roleplaying Game, included the first reference to the Opera House.