Om Cosmic Mandala is handpainted in Nepal which is a symbolic representation of part or all of the universe.
For example, it can represent the home of a specific meditational deity.
It is commonly used in meditation practices and as a visual aid in rituals. Mandalas have a circular structure, and most are two dimensional, despite the fact that they commonly depict three-dimensional objects.
They can be painted on cloth (e.g. a thangka), wood, or constructed out of the sand.
Cosmic mandala shows the intricate dance of the sun, moon, and other planets around Mount Meru (the axis of the geocentric universe).
In this view you are looking down on Mount Meru (a bird's eye view) from such a height that you cannot see any detail in the world below.
The following prayer is usually recited as part of the offering:
The fundamental ground is scented with incense and strewn with flowers,
Adorned with Mt. Meru, the four continents, the sun, and the moon.
I imagine this as a buddha-land and offer it.
May all sentient beings enjoy this pure realm.