A Duma (Ukrainian: дума, plural dumy) is a 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). Dumas are sung in recitative, in the so-called "duma mode", a variety of the Dorian mode with raised fourth degree.
Dumy were songs built around historical events, many dealing with the military actions in some form. Embedded in these historical events were religious and moralistic elements. There are themes of the struggle of the Cossacks against enemies of different faiths or events occurring on religious feast-days. Although the narratives of the dumy mainly revolve around war - the dumy themselves do not promote courage in battle. The dumy impart a moral message in which one should conduct oneself properly in the relationships with the family, the community, and the church. However, the kobzari did not play only religious songs and dumy. They also played “satirical songs (sometimes openly scabrous); dance melodies; either with or without words; lyric songs; and historical songs”.
The relationship between the military and the religion with dumy originated in the Cossack rebellion of 1648. Ukraine fell under the control of the Catholic Polish-Lithuanian Commonwealth, that imposed discriminatory measures on the Eastern Orthodox Church. This rebellion was followed by “partition and eventual subjugation of the Ukrainian lands and the Ukrainian church. The Cossacks rebelled against the religious oppression and their lands were eventually lost to the oppressor. This causes a great dilemma in the church because the Cossacks were defenders of the faith, and since they lost, and the faith is infallible, the Cossacks themselves must have done something sinful. This is why dumy has a great religious undertone and is a song that tells of death and defeat, not of victory.