Moonlight, a Study at Millbank (J.M.W. Turner)

Moonlight, a Study at Millbank is an oil painting by J. M. W. Turner, painted . The nocturne is painted in oils on a mahogany board which measures . It has been held by the Tate Gallery since 1910.
The work depicts a nighttime view of the River Thames from Millbank, near the current location of Tate Britain, with a low moon glinting on the water and silhouetting buildings, trees, and boats. Turner exhibited the painting at the Royal Academy in 1797, the year after his first work was shown there: another maritime nocturne, "Fishermen at Sea". 
The painting was left to the British nation as part of the Turner Bequest, then titled "River Scene Moonlight". It was transferred to the new National Gallery of British Art (now the Tate Gallery) in 1910. For many years, this painting was mistakenly considered to be the first oil painting that Turner had exhibited, until "Fishermen at Sea" was identified.