query: #Map of all the paintings for which we know a location with the count per location
  #defaultView:Map
  SELECT ?locationLabel ?coord (count(*) as ?count)
  WHERE {
      ?painting wdt:P31 wd:Q3305213 .
      ?painting wdt:P170 wd:Q5582 .
      ?painting wdt:P1071 ?location .
  	?location wdt:P625 ?coord
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }       
  }
      GROUP BY ?locationLabel ?coord