While Bhutan is definitely one of the smallest countries in the world, yet the cultural diversity and its richness are profound. Bhutan has successfully preserved many aspects of her culture, which dates directly back to the 17th century. Modern Bhutanese culture derives from ancient culture. Bhutanese society is centered on the practice of Buddhism, which is the main religion. Men wear a knee length robe tied with a belt called gho, folded in such a way to form a pocket in front of the stomach. Women wear colourful dress called Kira covering their full body.