One of the standout pieces was Chris Burden's 'Buddha's Fingers' (2014-2015), a cluster of 32 antique, cast-iron street lamps, electrified with LED bulbs. In 2000, the late American artist started collecting the lamps that used to line streets in Los Angeles during the 1920s and 1930s, and repurposed them as sculptural installations. 'Buddha's Fingers' is one of the last sculptures made by Burden – the first artist to have been represented by Gagosian – before he died of cancer, aged 69, in May 2015.

Several political works on the subject of global warming were on view. At Galerie Schlichtenmaier from Stuttgart, Germany, were two lightboxes, titled 'One World' (2016) by Eckart Hahn. The continents of the world are ablaze in flames, the black background representing the oceans. The economic differences between countries eliminated, the commonality remains the fire. The artist realised the image by first recording burnings of pollen and processed this digitally onto the forms of the continents.

Julian Charrière, Hickory - First Light, 2016 , courtesy Dittrich & Schlechtriem, Berlin
Concern about global warming also underpins Brigitte Kowanz's neon and mirror piece, 'UN Climate Change Conference Paris 30.11.2015 12.12.2015' at Galerie Nikolaus Ruzicska in Salzburg, Austria. Kowanz, along with Erwin Wurm, is representing Austria at the Venice Biennale, where she is expected to be exhibiting similar pieces in a specially conceived white cube in the Austrian Pavilion's former garden.

The 52nd edition of Art Cologne will take place from 19-22 April 2018.

Christopher Chiappa, Installation view of Livestrong Cologne, 2017, Handmade sculptures with paint, epoxy resin and fiberglass on plaster Installation for Kate Werble Gallery, Art Cologne 2017, Photo credit: 0815 studio, Cologne 
Péter Szalay, Diogenes's Lamp, 2014 (2017), candle, binoculars, 35 x 25 x 20 cm, ed. 2 copy
Brigitte Kowanz's neon and mirror piece, 'UN Climate Change Conference Paris 30.11.2015 12.12.2015
Pascal Haudressy, Monolithe 5 (left) and Monolithe 2 (right), 2016, Oil painting and video projection on canvas, numeric loop, 200 x 200 cm each, unique. Courtesy Irène Laub
Chris Burden, Buddha's Fingers (2014-2015), ©Chris Burden. Image courtesy of The Chris Burden Estate and Gagosian. Photo: Jeff McLane