June 16 2009, 2:39pm

This remarkable depiction of the surface of the full moon in oil is the work of Julius Grimm (1842-1906), scientific photographer and Hofphotograph (court photographer) to the Baden court, and was presented to Grand Duke Friedrich I von Baden in 1888. Grimm knew of the Grand Duke's fascination with astronomy and was granted an audience with Friedrich in November 1887, during which Grimm's photographs of the moon were discussed. Soon, Grimm embarked on an ambitious project to produce an oil painting of the moon, based on his photographs, to be presented to the Grand Duke. Grimm's representation features an arrow to the left of the moon, which indicates the direction of illumination adopted by Grimm. The shadowed surface would have been based on photographs of the different phases of the moon, when shadows do occur, as well the model-making technique that Grimm also adopted.