The easiest phase of portraits to identify are those dating to the time of Caligula, when a fair abundance of coins were minted with an image of his mother on them. It is a posthumous portrait of her with idealized features. In the phase following Claudius' marriage, her features are made to more closely resemble those of her daughter. The goal was to strengthen Agrippina the Younger's connection with her mother. Finally, the portraits of her dating to the time of Tiberius are still idealized, but not as much as those from the period of Caligula's reign. Images of Agrippina from this period are the most lifelike.