Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Baalbek' has mentioned 'Tonnes' in the following places:
Occurrence Sentence Text Source
In 1977, Jean-Pierre Adam made a brief study suggesting most of the large blocks could have been moved on rollers with machines using capstans and pulley blocks, a process which he theorised could use 512 workers to move a 557 tonnes (614 tons) block.
It is estimated to weigh 1,650 tonnes (1,820 tons).
[j] These walls were built from about 24 monoliths, at their lowest level weighing approximately 300 tonnes (330 tons) each.
They weigh approximately 800 tonnes (880 tons) each.
[142] Its weight, often exaggerated, is estimated at 1,000 tonnes (1,100 tons).
[143] A fifth, still larger stone weighing approximately 1,200 tonnes (1,300 tons)[144] lies in the same quarry.
[152] The architrave and frieze blocks weigh up to 60 tonnes (66 tons) each, and one corner block over 100 tonnes (110 tons), all of them raised to a height of 19xc2xa0m (62.34xc2xa0ft) above the ground.