Little is known about the Albanian people prior to the 11th century, though a text compiled around the beginning of the 11th century in the Bulgarian language contains a possible reference to them. It is preserved in a manuscript written in the Serbo-Croatian Language traced back to the 17th century but published in the 20th century by Radoslav Grujic. It is a fragment of a once longer text that endeavours to explain the origins of peoples and languages in a question-and-answer form similar to a catechism.