Missionary activity as a religion spread, can be expressed as an attempt to move the Christianity perception (Kingdom of God), that to the world that not adopted yet. However, missionary works have also some other aspects that can be seen as a culture, an ideology, or even as a political tool. Missionary is not not a new phenomenon, but is a new mean to extending the form of the modern nation-state to traditional societies. The Protestant-Evangelical missionary, in the emergence of nation states, since the 19th century, has been a quite moderate tool in the seperation of the Church from national idenitites in Balkan socieites. Organized by the clergy of the Protestant-Evangelical missionary conducted through educational institutions and communities to target not only the Balkans; but also exceptions, such as India's pursuit of a "nation" Catholics living under the system (sometimes Orthodox) seems directed to the Christian and Muslim communities. The 19th century, during wihch Missionary activities go towards the ancient world from the new world, is also a transformation and transition period in which the consequences of the Industrial Revolution, the Enlightenment, the Renaissance and the Reformation were perceived strongly. This period is an era when empires, dynasties and multiethnic societies began to organize around new identities and new political structures while the values of the new world (American) had begun to spread to the old world (Europe and Asia). In this paper, within the framework expressed in the upper line, the role of the educational missionary activities around Robert College in the 19th century and Robert College itself, a high school founded by the Evangelist Protestant Missionary in Istanbul which is the center of the multicultural and multireligious Ottoman society, in the establishment of the Bulgarian national identity and national state will be analyzed.