For ye were as sheep going astray; but are now returned unto the Shepherd and Bishop of your souls.
1 Peter 2:25
Thus, when in AD 13, the powers held by
Tiberius were made equal, rather than
second, to Augustus' own powers, he was
for all intents and purposes a "co-Princeps"
with Augustus
....
Thus, according to Suetonius, these ceremonies and the declaration of
his "co-Princeps" took place in the year AD 12, after Tiberius' return
from Germania.
Tiberius. (2024 Jan 1). In Wikipedia. https://en.wikipedia.org/wiki/Tiberius