Part of this process included legitimizing the lineage Tenochtitlan's rulers. These Mexica rulers used the time they spent in Culhuacán territory, and the links formed from it for this purpose. The ruling family could trace its ancestors back to Culhuacán ruler Nahuyotl. This and various marital ties from the past would make these new rulers descendants from the old. This was formalized with the government of Acamapichtli, who was granted the title of “culhua tecuhtli” (Lord of the Culhuas) . The Alliance came to include thirty dominions, with Tenochtitlan, Texcoco and Tlacopan, with Texcoco dominating the formerly powerful city of Culhuacán as well as Iztapalapa. As Tenochtitlan's power grew, it eventually ruled the new empire alone.