I don't know if this is a step in the proper direction or not, but there are enough similarities to venture this as a guess:
The constellation Cassiopeia.
Transformation, inner space and body's grace
In Greek Mythology, Cassiopeia was a vain Queen that was banished to the the "heavens" by Poseidon after claiming that she and her daughter were more beautiful than the Nereids. She was effectively transformed from a mortal to a constellation. Inner space could be a reference to her banishment to the sky and body's grace a reference to her self proclaimed beauty?
From the eastern belt, Beauty mesmerizes the complete space
This could be another astronomy reference. The Cassiopeia constellation is visible year-round for countries located in the Norther Hemisphere, which may be a tie into complete space. Because the night approaches from East (e.g. eastern belt), this may also be a reference to the evening sky.
Compilation between 200 bce and 200 CE was my base
Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy. This fits the timing of the riddle rather nicely.
I am a feeling , a joy and a beautiful place
Cassiopeia was accused of being vain, and likely said something similar to this which lead to her downfall. If you heard someone say this, you would accuse them of being rather vain as well.
Hint : three breaks
In Chinese astronomy, the stars forming the constellation Cassiopeia are found among three areas: the Purple Forbidden enclosure (紫微垣, Zǐ Wēi Yuán), the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ), and the White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ).
Again, not everything here is the best fit and I do have to stretch for some things, but enough details match or are rather close that I had to post this as a possible answer.