Introduced in Paths of Destruction, there were originally three Lugiain citadels, located at 56.5S, 67E, 67.9S, 62.6E, and 70.2S, 24.2E, all level 15+. They were identical copies of eachother. Each contained Obeloth Lithos and Gigas Lugians. At the end of the dungeons there was a SIK chest.

In Groundswell the citadels were updated, and two additional citadels were added in the Direlands. The Lugians inside were changed to Gotrok and Raider lugians, and the lugians were updated to stronger types. Only the Lin location remained essentially the same as the previous versions. The three mainland citadels still have SIK chests. The two citadels in the direlands contain SSK chests.

From Directions to the Lugian Citadels:

These are directions to the Lugian Citadels that were taken by the Lugian Renegades from our allies the Linvak Lugians.
Hills Citadel Portal (20-40)
Nearby Towns: Lin, Baishi
Location: 56.6S 66.9E
Ridge Citadel Portal (40-60)
Nearby Towns: Lin, Kara, Baishi
Location: 67.9S 62.6E
Wilderness Citadel Portal (40-60)
Nearby Towns: Qalabar [sic]
Location: 70.2S 24.2E
Mountain Citadel Portal (60-80)
Nearby Towns: Fort Tethana
Location: 5.4N, 71.7W
Desert Citadel Portal (60-80)
Nearby Towns: Candeth Keep
Location: 84.5S 59.7W