In AD 28, the Senate voted that altars to "Clementia" (mercy) and "Amicitia" (friendship) be raised. At that time, "Clementia" was considered a virtue of the ruling class, for only the powerful could give clemency. The altar of "Amicitia" was flanked by statues of Sejanus and Tiberius. By this time, his association with Tiberius was such that there were those in Roman society who erected statues in his honor and gave prayers and sacrifices in his honor. Sejanus' birthday was honored as if he were a member of the imperial family. According to Richard Alston, "Sejanus' association with Tiberius must have at least indicated to the people that he would be further elevated."