In addition to the above there was also the secret police, in direct subordination to the ministry of the interior, of which the principal function is the discovery, prevention, and extirpation of political sedition. Its most famous development was the so-called Third Section (of the imperial chancery) instituted by the emperor Nicholas I in 1826. This was entirely independent of the ordinary police, but was associated with the previously existing Special Corps of Gendarmes, whose chief was placed at its head. Its object had originally been to keep the emperor in close touch with all the branches of the administration and to bring to his notice any abuses and irregularities, and for this purpose its chief was in constant personal intercourse with the sovereign.