The national symbols of Bhutan include the national flag, national emblem, national anthem, and the mythical druk thunder featured in all three. Other distinctive symbols of Bhutan and its dominant Ngalop culture include Dzongkha, the national language; the Bhutanese monarchy; and the driglam namzha, a seventeenth-century code on dress, etiquette, and dzong architecture. Natural symbols of Bhutan are its national flower, the Himalayan blue poppy; its national tree, the Himalayan cypress; its national bird, the raven; and its national animal, the takin.