* Astronomy

Professor Nguyen Van Hao, former deputy head of the Archaeological Institute, told Thanh Nien the structure found in Dong Da district last year by a roadwork unit was not the dan xa tac (state altar) of the Ly Dynasty (1010-1225).
The top of the xa tac must be a high platform covered in five different-coloured soils which this site was not, he said.
Instead, it was tiled and small less than 15 square meters while the state altar would have been larger.

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