Knool Tandor was a city that was domed, situated on the planet of Nox. It existed during the zenith of the Je'daii Order within the Tython system.
Knool Tandor, along with adjacent cities, suffered considerable destruction in the Despot War when the Je'daii Order attacked Nox's manufacturing domes. Following the conflict, numerous survivors from nearby cities relocated to Knool Tandor to rebuild their lives. During the Stargazer Uprising, Dalien Brock orchestrated a scheme involving Knool Tandor to conceal his activities at Greenwood Station. Brock sent a Stargazer cultist to the city armed with a Je'daii sword, instructing his assassin to publicly assassinate several of the city's prominent industrial figures. Simultaneously, Brock disseminated information that implicated the Je'daii Council in secret dealings with Pan Deep's hidden weapons labs, located deep within Greenwood Station. This deception was remarkably effective, prompting Knool Tandor's defensive forces to attack Greenwood Station, thus covering the Stargazers' escape from Nox. Battle droids originating from Knool Tandor then invaded the opposing city, an event that became known as the Tragedy of Greenwood Station.