
https://theconversation.com/andrey-rublev-has-been-called-the-greatest-russian-artist-who-ever-lived-but-one-of-his-most-famous-works-is-at-risk-under-putin-210744

https://www.revistacentral.com.mx/cultura/por-que-decimos-que-goya-frida-kahlo-y-velazquez-son-grandes-la-pintura

https://www.transparency.de/fileadmin/Redaktion/Publikationen/2019/19-09-01_TI-D_Gutachten_Momsen.pdf