In a letter to a congregation in Rome from Corinth in 57 AD, Paul wrote a list of personal greetings at the end of the letter, in whuch he says, 'Erastus, the city treasurer, sends you his greetings...'
An inscription on a pavement was discovered form the ancient ruins of Corinth in 1929 which most likely refers to this Erastus.
The pavement was laid about A.D. 50.
The inscription reads:
ERASTVS PRO AEDILIT E
S P STRAVIT
One translation is :
Erastus, commissioner of public works [aedile], laid this pavement at his own expense.