Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Buddhist Monuments at Sanchi' has mentioned 'Brick' in the following places:
Occurrence Sentence Text Source
Its nucleus was a simple hemispherical brick structure built over the relics of the Buddha.
[6] Its nucleus was a hemispherical brick structure built over the relics of the Buddha,[6] with a raised terrace encompassing its base, and a railing and stone umbrella on the summit, the chatra, a parasol-like structure symbolizing high rank.
It was covered in brick, in contrast to the stones that now cover it.
[20] The original brick stupa was covered with stone during the Shunga period.