Iziz Royal Palace
From Wookieepedia, the Star Wars wiki.
The Iziz Royal Palace was home to the royalty of Onderon in the city of Iziz. It was accessed by the Sky Ramp, which connected directly to the Merchant Quarter. There was a great wall that was once used to protect against the Beast Riders, but essentially became obsolete following the marriage of Oron Kira and Princess Galia. The palace was stormed by General Vaklu and his forces during the Onderon Civil War against Queen Talia. With the help of the Jedi Exile and Jedi Master Kavar, Vaklu was defeated and the war ended.
