2018 will be the European Year of Cultural Heritage. Proposal by European Commission lies at Parliament & Council, possible funding opportunities still unclear. It will offer loads of opportunities to collaborate through WLM with numerous European organisations - governmental or not - around monuments and heritage. Europeana and the heritage organisations come to mind. More info: http://ec.europa.eu/culture/news/2016/0830-commission-proposal-cultural-heritage-2018_en.htm
Dominik at WMDE is onto this. Lets keep an eye and brainstorm further after the rush of WLM2016.