It may not be the most profound gauge of public sentiment, but for what it’s worth, the top-selling postcard at the Tate Britain this past year was a semi-nude study by Lucien Freud called “Girl With White Dog.” This is notable mainly because the top-selling card had been Millais’s serene and Victorian “Ophelia” for a decade. The museum’s director hopes the Freud card’s popularity is a sign that audiences are becoming more accepting of contemporary art.