Rhein, also known as Rhein I, is a colour photograph created by the German photographer Andreas Gursky in 1996. The photograph had a six copies edition. This was the first version of a photograph that become better known with his second version, Rhein II, in 1999.^[1][2]

The photograph was created using digital manipulation, which removed several human references, including people and buildings. The final result, showing the river flowing across green fields, beneath a blue cloudy sky, has similarities with the abstract paintings of Barnett Newman. Peter Galassi stated that: "Behind Gursky's taste for the imposing clarity of unbroken parallel forms spanning a slender rectangle lies a rich inheritance of reductivist aesthetics, from Friedrich to Newman to Richter to Donald Judd... (with) images that read like horizontal versions of Newman paintings."^[3] This version has less vivid colors and a narrower field of vision than Rhein II.

Three prints of this photograph are among the most expensive ever sold. A print was sold by $2,098,500 at Sotheby's, New York, at 10 May 2011, and another by $1,925,000 at Phillips, at 16 May 2013.^{[4] [5][6]} A third sold by $1,805,000 at Sotheby's, New York, at 12 November 2014.^[7]

A print of the photograph is held at the Samsung Museum of Art, in Seoul.^[8]