The establishment of Qajar rule by Agha Muhammad Khan in 1786 initiated a period of relative stability in Iran which lasted through the nineteenth century to 1925. His two most important successors, Fath ‘Ali Shah (1797–1834) and Nasir al-Din Shah (1848–1896), during their long reigns, saw the stabilization of Iran's borders to their present limits and maintained a cautious balance in domestic policy with the religious, administrative, and commercial authorities, and in international relations with European powers. One of the main results of Qajar foreign policy was increased contact between Europeans—such as diplomats, military personnel, technical and educational experts, merchants, archaeologists, and curious travelers who spent long periods of time in Iran, and the Iranians who received them. As hospitality is one of the main features of Iranian social culture, receptions and entertainment played a major role in both formal diplomacy and at private picnics and parties.