GMAT Test Prep: SC-27109862 GMAT Sentence Correction

Constructed at least as early as the Sui dynasty (A.D. 581-618), the Altar of Heaven is the oldest known altar used in Chinese state religious practice, more than 1,000 years older than a similar one in Beijing, it is the only altar found so far that predates the Qing dynasty (A.D. 1644-1912).
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