Trenzalore was settled by humans approximately 150 years before the Siege of Trenzalore, at which time the Truth Field did not exist.(PROSE: The Dreaming) The early settlements stockpiled boronite, which they used to reach underground hot springs by exploding the bedrock that covered them. The leftover boronite was eventually shelved. (PROSE: Strangers in the Outland) The "fall of the Eleventh" upon the fields of Trenzalore became the subject of a prophecy, related to the Eleventh Doctor by Dorium Maldovar. (TV: The Wedding of River Song)