Cornelis Jonson van Ceulen: The Quiet Master of Seventeenth-Century Portraiture Cornelis Janssens van Ceulen, more commonly known as Cornelis Jonson (1593-1661), stands as a quietly significant figure in the history of English and Dutch portrait painting. Born into a family of Flemish/German immigrants seeking refuge from religious persecution in London, his life’s trajectory mirrored that of many artists of his era – a journey betwee…