1965-1996
Onesti was built starting in 1953 on the site of a 15th century settlement. It was part of the communist strategies to industrialise the country.
It developed as the urban counterpart to the huge oil, chemical, and industrial complexes (Borzesti) in the Trotuş River valley, which includes the older settlements of Dărmăneşti and Târgu Ocna. The city has an oil refinery, and just southeast are chemical and synthetic rubber works and a thermoelectric power station.
The design of the city was made with a high level of ambition as is exemplified by the shopping centre, cultural center and athletic halls. The standardised housing blocks sparked a discussion on the identity of urban environment.