A Duma (, plural "dumy") is an epic sung epic poem which originated in Ukraine during the Hetmanate Era in the Sixteenth century (possibly based on earlier Kievan epic forms). Historically, dumy were performed by itinerant Cossack bards called kobzari, who accompanied themselves on a kobza or a torban, but after the abolition of Hetmanate by the Empress Catherine of Russia the epic singing became the domain of blind itinerant musicians who retained the kobzar appellation and accompanied their singing by playing a bandura (rarely a kobza) or a relya/lira (a Ukrainian variety of hurdy-gurdy).