The symbol of the Dhvaja represents the Buddha's victory over the four māras, or hindrances in the path of enlightenment. A cylindrical banner can usually be seen placed on monastery roofs which are often made of beaten copper.
This really highlights Buddha's triumph of knowledge over ignorance.
The māras that were defeated were said to have come in four types. Each of these represented a hurdle in the way to enlightenment. These were:
- Mara of emotional defilement
- Mara of passion
- mara of the fear of death
- mara of pride and lust
By defeating these, Buddha was able to clearly show the path to enlightenment, and the victory banner is displayed prominently for all those seeking enlightenment to remember the path.