query: #defaultView:Map
  SELECT ?painting ?paintingLabel ?collection ?collectionLabel ?image ?coord
  WHERE {
    ?painting wdt:P31 wd:Q3305213 .
    ?painting wdt:P170 wd:Q37571 .
    ?painting wdt:P195 ?collection .
    
    OPTIONAL { ?collection wdt:P625 ?coord }
    
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }
  