Niko I Dadiani studied in Paris, and upon return to Georgia in the 1860's, he renounced his title as Prince Regent, making him the last Prince of Mingrelia.
Niko remained in St. Petersburg, enjoying the favor of the imperial family even after his mother hurried home due to a peasant revolt in Mingrelia in May 1857. Niko Dadiani was then sent for further education in Paris. On his return, Niko, persuaded to accept a fait accompli, renounced his hereditary title of Prince Regnant of Mingrelia on 4 January 1867. 
