the.com/established
The moment a thing stopped being an idea and started being a fact.
means Set up firmly, recognized, or proven to exist and likely to keep existing.
from From Latin stabilire, to make stable, via Old French establir — literally to make something stand.
Founding datesEst. on signage means established, not estimated.
Legal weightEstablished facts no longer require proving in court.
Old moneyOld establishments flaunt founding years like credentials.