Tanaquil was the wife of Lucomo Tarquinius, who later changed his name to Lucius Tarquinius Priscus. Tanaquil encouraged him to immigrate to Rome. While on the road, an eagle flew off with Tarquin's hat. It then returned it to his head. Tanaquil, who was deeply religious, interpreted this as a sign that the gods wanted him to become a king. Tanaquil helped to integrate the family into Roman society, and he was eventually elected to the position of king. As queen she was one of Tarquin's most trusted advisors. After her husband was murdered she maneuvered Servius Tullius into the monarchy.

Source

• Livy book 1