Bulgarian Millet (Bulgar Milleti) was an ethno-religious and linguistic community within the Ottoman Empire from the mid-19th to early 20th century. The semi-official term Bulgarian millet, was used by the Sultan for the first time in 1847, and was his tacit consent to a more ethno-linguistic definition of the Bulgarians as a nation. Officially as a separate Millet in 1860 were recognized the Bulgarian Uniates, and then in 1870 the Bulgarian Orthodox Christians (Eksarhhâne-i Millet i Bulgar). At that time the classical Ottoman Millet-system began to degrade with the continuous identification of the religious creed with ethnic identity and the term millet was used as a synonym of nation. In this way, in the struggle for recognition of a separate Church, the modern Bulgarian nation was created. The establishment of the Bulgarian Exarchate in 1870, meant in practice official recognition of a separate Bulgarian nationality, and in this case the religious affiliation became a consequence of national allegiance. The founding of an independent church, along with the revival of Bulgarian language and education, were the crucial factors that strengthened the national consciousness and revolutionary struggle, that led to the creation of an independent nation-state in 1878.
All Orthodox Christians, including Bulgarians, in the Ottoman Empire were subordinated to the Patriarchate of Constantinople, which was dominated by Greek Phanariotes by the end of the 19th century. The Orthodox Christians were included into the Rum Millet. Belonging to this Orthodox community grew more important to the common people than their ethnic origins and the Balkan Orthodox people identified themselves simply as Christians. Nevertheless, ethnonymes never disappeared and some form of ethnic identification was preserved as evident from a Sultan's Firman from 1680, which lists the ethnic groups in the Balkan lands as follows: Greeks (Rum), Albanians (Arnaut), Serbs (Sirf), Vlachs (Eflak or Ullah) and Bulgarians (Bulgar).