Communis locus: common place (not to be confused with the English adjective in one word!) = first sense = a public place; metaphorical sense = the abode of the dead.
Plautus, Casina, line 19.
Ea tempestate flos poetarum fuit (Plautus),
Qui nunc abierunt hinc in communem locum.
At that time he was the flower of the poets,
Who now have left from here to the place that is common to all.
This is in the prologue, which, needless to say, wasn't written by Plautus himself.