During a protracted period of economic depression two hundred years ago, the Corellian government commissioned a morale-building museum to celebrate the planet's greatest technological and industrial achievements. Twenty years and hundreds of millions of credits later, the Museum of Corellian Industry finally opened to tepid public response.
When Republic forces regrouped in Axial Park, they quickly secured this remote and mostly-abandoned museum as a staging area. Darth Thanaton, sensing opportunity, personally eradicated the Republic forces occupying the sturdily built structure. Rather than reporting this victory to Imperial leaders, he instead made the museum his own private bunker.