Assertion: pyramid's volume | /r/HasProperty | about 2.5 million m³.
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text: According to the Guinness Book of Records, it is in fact the largest pyramid as well as the largest monument ever constructed anywhere in the world, with a total volume estimated at over 4.45 million m³, even larger than that of the Great Pyramid of Giza in Egypt which is about 2.5 million m³.