The Art Institute of Chicago will soon return a fragment of architectural ornament to the Thai government. According to an announcement from the AIC Tuesday, an in-house research team led by a Khmer art specialist determined the museum’s provenance information for the artifact was incorrect. The fragment, which depicts the Hindu god Krishna lifting Mount Govardhana in northern India, is from the Phanom Rung temple in northeastern Thailand — not Cambodia, as the museum originally believed. A site visit to Phantom Rung earlier this year confirmed the 12th century fragment was originally part of a pilaster, or rectangular column, framing...