An Unknown Man by Andrea Solario, c.1495. (National Gallery, London

An Unknown Lady attributed to Giovanni Antonio Boltraffio, c.1495-99. (Louvre, Paris)

An Unknown Lady by Albrecht Durer, 1497.

An Unknown Man by Alvise Vivarini, 1497. (National Gallery, London)

Dierick Berek by Hans Holbein, c.1497.98. (Jules Bache Collection)

Erasmus of Rotterdam by Hans Holbein, c.1497-98. (Robert Lehman Collection)

Felicitas Tucher by Albrecht Durer, 1499. (Kunstasammlung, Weimar)

Albrecht Durer, Self Portrait, 1500. (Munich, Alte Pinakothek)

An Unknown Man by Giovanni Antonio Boltraffio, c.1500. (National Gallery, London)

Anna Putsch by Lucas Cranach the Elder, c.1502-03 (Winterthur, Oskar Reinhart Collection)

An Unknown Lady by Sanzio Raffaello, c.1505.

An Unknown Lady by Lucas Cranach the Elder.

Barbara Schellenberger by Hans Burgmair, c. 1505-07. (Wallraf-Richartz Museum, Colgne)

Agnolo Doni by Raphael, c.1505-06. (Palatine Gallery, Florence)

An Unknown Lady by Sanzio Raffaello, 1507.

Johann Friedrich the Magnanimous, aged 6 by Lucas Cranach the Elder, 1509. (National Gallery London)

An Unknown Man by Titian, c.1509-10. (National Gallery, London)

Barbara Pallavicino by Alessandro Araldi, c. 1510. (Galleria degli Uffizi, Florence)

An Unknown Man by Francesco Granacci, c.1510. (National Gallery, London)

Katharina von Mecklenburg, wife of Henry the Pious by Lucas Cranach the Elder, 1514.

An Unknown Man by Franciabigio, 1514. (National Gallery, London)

An Unknown Man by Palma Vecchio, c.1515-20. (National Gallery, London)

Dorothea Hasen by Hans Holbein, 1516. (Offentliche Kunstasammlung, Basle)

Admiral Bonnivet by Jean Clouet, c.1516. (Musée Condé, Chantilly)

Wedding portrait of Charles Brandon, Duke of Suffolk and Mary Tudor, c.1516. (Marquess of Tavistock)

Count Philip by Hans Baldung Grien, 1517. (Alte Pinakothek, Munich)

Erasmus of Rotterdam by Quentin Massys, 1517. (Galleria Nazionale d'Arte Antica, Rome)

Benedikt von Herdentstein by Hans Holbein, 1517. (Metropolitan Museum of Art, New York)

An Unknown Man by Andrea del Sarto, c.1517-18. (National Gallery, London)

An Unknown Lady by Correggio, c.1519. (The Hermitage, St. Petersburg)

Edward Stafford, Duke of Buckingham by an Unknown Artist, 1520. (Magdalene College, Cambridge)

An Unknown Man by Lucas van Leyden, c.1520. (National Gallery, London)

An Unknown Lady by Juan de Borgonac, c.1520-30.

An Unknown Man by Quentin Massys, c.1520-30. (National Gallery, Scotland)

An Unknown Man by Rosso Fiorentino, c.1520-22. (National Gallery, London)

Erasmus of Rotterdam by Hans Holbein, 1523. (Rome, Galleria Nazionale d'Arte Antica)

Erasmus of Rotterdam by Hans Holbein, 1523. (Private Collection)

Erasmus of Rotterdam by Hans Holbein, 1523. (Offentliche Kunstasammlung, Basle)

An Unknown Man by Parmigianino, c.1523. (National Gallery, London)

Venus and Cupid by Hans Holbein, c.1524. (Offentliche Kunstasammlung, Basle)

An Unknown Lady by an Unknown Jan Gossaert

An Unknown Man by Jan Gossaert, c.1525-28. (Gemäldegalerie, Berlin)

An Unknown Man by Jan Gossaert, c.1525-30. (National Gallery, London)

An Unknown Child by an Artist of the Flemish School, c.1525-40. (Metropolitan Museum of Art, New York)

An Unknown Italian Noble by Moretto da Brescia, 1526. (National Portrait Gallery, London)