Ca trù is a traditional form of Vietnamese music that originated in the northern regions of Vietnam. It combines singing with instrumental accompaniment, typically featuring instruments like the đàn đáy and trống. The performances often take place in intimate settings, where the singer, known as a ca trù, expresses emotions through poetic lyrics. This art form has deep cultural significance and is often associated with the Vietnamese royal court and folk traditions. In 2009, ca trù was recognized by UNESCO as an Intangible Cultural Heritage of Humanity, highlighting its importance in preserving Vietnam's rich cultural heritage.