"material"=>"ceramic","start_date"=>"1960","artist_name"=>"Dick Elffers","artwork_type"=>"mural"
"artist_name"=>"Gust Romijn","artwork_type"=>"sculpture","material"=>"bronze","start_date"=>"1970-11-06","url"=>"https://www.bkor.nl/beelden/het-oneindige-huis/"