The estimated age of ROI water is some 8,000 years ago
Remains from Celts and Romans indicate the spring has been in use since ancient times
The archives of the parish church of St. Cross in Rogaška show some locals lived for a hundred years thanks to the mineral water ROI
The first chemical analysis by Leonard Thurneysser
Count Peter Zrinski recovered from jaundice by drinking ROI
ROI got its first monograph Roitschocrene by Joannes Benedict Gründel, Europe’s only monograph about mineral water
Doctors in Vienna start prescribing ROI to high-profile patients
ROI is world’s third best selling water
Rogaška springs are renovated
Relaunch of the ROI brand