The Great Assembly House was a building on the planet Serenno. In this bell-shaped hall, members of the Great Houses of Serenno—the six major noble families—met to discuss matters of planetary importance. Member of the lesser houses also took part to the parliament, although performing a purely advisory role. Following the assassination of Adan Dooku in 3 BBY, the Great Houses gathered to find a suitable regent for the new Count of the House Dooku, the ten-year-old Bron Dooku.
- Agent of the Empire—Hard Targets, Part 2 (First appearance)