EN
A travelling was lengthy, dangerous and expensive in the middle Ages; long-distance travels were therefore not as frequent as they are today. Travellers were mostly traders, soldiers, artists, diplomats and missionaries. Byzantine scholars and saints, Constantine the Philosopher and his brother Methodius may be included in the two latter categories. The natives of Thessaloniki made several journeys in the second half of the 9th century. The study focuses on their missions to the Arabs, the Khazars, to Great Moravia, and, finally, to Rome in 867, which was their last joint mission. The paper suggests possible routes and chronology of the journeys the brothers made during the studied period.