Portrait of a young man, half-length, in a brown mantle and a dark cap, a letter in his hands -
Lorenzo Lotto
Portrait of Giovanni della Volta with his Wife and Children 1547 -
Lorenzo Lotto
Portrait of a Man with Three Sons c. 1530 - Barthel Bruyn
Portrait of a Gentleman, small three-quarter length, in a red robe, beside a draped table - Thomas van der Wilt
Portrait of Mrs Tom Roberts - Thomas William Roberts
Portrait of the sculptor Georg Petel (1601-2-c. 1634), half-length - (after) Dyck, Sir Anthony van
Portrait of a Woman with a Tambourine - Jean-Alexis Grimou
Portrait of a Boy with Pet Spaniel - Martin II Mytens or Meytens
Portrait of Philip II 1527-1598, King of Spain, illustration from Portraits of Famous Men, 1599 - Francisco Pacheco
Portrait of Ynyr Burges - George Romney
Portrait of the Poet and Playwright Alexey Tolstoy as a Youth 1836 - Julia Vajda
Portrait of a Woman c. 1506 - Lorenzo Lotto
Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the 
