The world's largest painting is actually a mural on a ceiling - Apparently.
The world's largest painting is a fresco on the ceiling of the Palazzo Giustiniani in Rome, Italy, created by Italian artist Domenichino in 1625. Measuring over 1,500 square meters (16,146 square feet), it's a sprawling depiction of the mythological story of Orpheus. The mural has been restored and preserved over the years, and its sheer scale and intricate details make it an awe-inspiring work of art.