The impact of social media has grown significantly during the past decade in several fields of our society. This article advocates the research subfield of social media memory studies based on empirical data from a case study on the role of social media in a local conflict about re-naming a public square in an average German town. The square had been named after Paul von Hindenburg, who played a crucial role in the implementation of Adolf Hitler as German Reichskanzler and was therefore regarded as an inadequate public patron. Conservatives fought against the new name, also on Facebook. Our findings indicate that the platform played a decisive role as counter-public sphere against hegemonic mainstream media and politics in fostering a new historical consciousness. The case might be seen as a precedent of right-wing movements and their use of social media in the Brexit campaign or the US elections.