The illustration on Google's homepage depicts a typical ca tru performance.
A representative of Google said that the move was to raise public awareness of traditional folk arts which are facing the risk of oblivion, as well as encourage the young generation to explore the unique and diverse cultural and art forms of Vietnam.
Taking into account the precious nature of an invaluable historical relic and the difficulty of its safeguarding, UNESCO is dedicated to protecting the practice and inscribed Ca tru on the List of Intangible Cultural Heritage in Need of Urgent Safeguarding.
According to UNESCO, Ca tru is a complex form of sung poetry found in the north of Vietnam using lyrics written in traditional Vietnamese poetic forms. Ca tru groups comprise three performers: a female singer who uses breathing techniques and vibrato to create unique ornamented sounds, while playing the clappers or striking a wooden box, and two instrumentalists who produce the deep tone of a three-stringed lute and the strong sounds of a praise drum. Some Ca tru performances also include dance.
The art genre appeared in the North around the 15th century and thrived until the early 20th century. Since then, it has decreased in popularity due to the spread of modern recreational and cultural activities./.