The wheel below is the Dharmackakra. It is known as the "wheel of law." It is one of the Ashtamangala symbols, representing the Buddha's teaching on the path to Nirvana.
Below is the Lotus flower, it represents purity and enlightenment for when one reaches Nirvana.
Below is the Mandala, or also known as the "endless knot," and it represents eternal harmony.
Below is the Parasol, it is a crown. It also represents protection from all of the elements.
This is the Dhvaja, it is also known as the victory banner. It is often set on top of monasteries to represent power.