Slanic City became known primarly due to the exploatation of salt
Begginings are related to Mihai Cantacuzino , who discovered a salt deposit in Slanic Prahova . His desire was to open a mine . He bought in 1685 - 1694 the Slanic estate and in 1688 took place the first salt exploatation in Valea Verde (Green Valley) .
In 1713 Cantacuzino donates the entire Slanic estate , and all the mines toMonastery Costea in Bucharest
From the seventeenth-century salt exploatation was made in Baia Baciului , Baia Verde and Dorobantesti , whereof there are no more informations