本文尚未提供此语言版本。

来源: www.jstor.org, www.metmuseum.org, www.loc.gov, www.europeana.eu, www.neh.gov, www.nationalarchives.gov.uk, www.vam.ac.uk, www.uffizi.it, www.wga.hu, www.history.ac.uk, library.stanford.edu, www.brown.edu/Departments/Italian_Studies/, scholarship.richmond.edu, www.frick.org