The search for the Rosetta lander Philae on the surface of comet 67P/Churyumov-Gerasimenko was successful.
Less than a month before the end of the Rosetta mission at comet 67P the search for the lander Philae was finally successful. An image taken on 2 September 2016 with the Osiris Narrow Angle Camera on board Rosetta shows Philae on the comet surface. This image also shows the orientation of Philae, making it clear why establishing communcations with Philae was difficult following its landing on 12 November 2014.
ESA Press release: http://blogs.esa.int/rosetta/2016/09/05/philae-found/