 Among these migrants were the grandparents of Bob Dylan and Greek politicians and artists.At the same time, thousands of Muslim refugees from the Caucasus arrived in the city, especially after 1864, in what is known as the Circassian genocide.Next to Constantinople, Smyrna (now Izmir) and Salonika (now Thessaloniki), Trebizond was one of the cities where western cultural and technological innovations were first introduced to the Ottoman Empire.