Portrait of <a href="https://en.wikipedia.org/wiki/Luigi_Beltrame_Quattrocchi_and_Maria_Corsin" class="extiw" title="en:Luigi Beltrame Quattrocchi and Maria Corsin">Luigi Beltrame Quattrocchi and Maria Corsin</a>
Unknown author<span style="display: none;">Unknown author</span>
1905
Ludmiła Grygiel, <i>Świętość dwojga</i>, Warszawa 2002, s. 14