a high degree of mutual intelligibility among the Belarusian, Russian, and Ukrainian languages. Within East Slavic, the Belarusian language is most closely related to Ukrainian. History The modern Belarusian language was redeveloped on the base of the vernacular spoken remnants of the Ruthenian language, surviving in the ethnic Belarusian territories in the 19th century. The end of the 18th century (the times of the Divisions of Commonwealth) is the usual conventional borderline between the Ruthenian and Modern Belarusian stages of development. By the end of the 18th century, (Old) Belarusian was still common among the minor nobility in eastern part, in the territory of present-day Belarus, of the Grand Duchy of Lithuania (hereafter GDL). Jan Czeczot in the 1840s had mentioned that even his generation's grandfathers preferred speaking (Old) Belarusian. According to A. N. Pypin, the Belarusian language was spoken in some areas among the minor nobility during the 19th century. In its vernacular form, it was the language of the smaller town dwellers and of the peasantry and it had been the language of oral folklore. Teaching in Belarusian was conducted mainly in schools run by the Basilian order. The development of Belarusian in the 19th century was strongly influenced by the political conflict in the territories of the former GDL, between the Russian Imperial authorities, trying to consolidate their rule over the "joined provinces", and the Polish and Polonized nobility, trying to bring back its pre-Partitions rule (see also Polonization in times of Partitions). One of the important manifestations of this conflict was the struggle for ideological control over the educational system. The Polish and Russian languages were being introduced and re-introduced, while the general state of the people's education remained poor until the very end of the Russian Empire. In summary, the first two decades of the 19th century had seen the unprecedented prosperity of Polish culture and language in the former GDL lands, and had prepared the era of such famous Polish writers as Adam Mickiewicz and Władysław Syrokomla. The era had seen the effective completion of the Polonization of the lowest level of the nobility, the further reduction of the area of use of contemporary Belarusian, and the effective folklorization of Belarusian culture. Due both to the state of the people's education and to the strong positions of Polish and Polonized nobility, it was only after the 1880s–1890s that the educated Belarusian element, still shunned