town crier

US /ˈtaʊn ˌkraɪ.ər/
UK /ˈtaʊn ˌkraɪ.ər/
"town crier" picture
1.

an official of a town or village who makes public announcements in the streets

:
The town crier announced the king's decree.
In ancient times, the town crier was an important source of news.