Complex sentence: Chausath Khamba, a Heritage Monument, initially built as a hall in an innovative eclectic architectural style of the period (Mughal), and later converted into a tomb, is a square structure constructed entirely of white marble.
Split into simpler sentences: Chausath Khamba, a heritage monument, was initially built as a hall in an innovative eclectic architectural style of the Mughal period. It is a square structure constructed entirely of white marble.