see Template:Chartlet static
https://wiki.openstreetmap.org/wiki/StaticMapLite
div class="chartlet-static" style="width:; height:; background-image:url(http://staticmap.openstreetmap.de/staticmap.php?center=,&zoom=&size=x&maptype=mapnik)"
wikimedia
div class="chartlet-static" style="width:; height:; background-image:url(https://maps.wikimedia.org/img/osm-intl,,,,x.png)"
