A Scholar
1631 (130 Kb); Oil on canvas, 104.5 x 92 cm (41 x 36"); Hermitage, St. Petersburg

The Syndics of the Clothmaker's Guild (The Staalmeesters)
1662 (130 Kb); Oil on canvas, 191.5 x 279 cm; Rijksmuseum, Amsterdam

Philosopher in Meditation
1632 (110 Kb); Oil on wood, 28 x 34 cm (11 x 13 1/2"); Musee du Louvre, Paris

The Anatomy Lecture of Dr. Nicolaes Tulp
1632 (130 Kb); Oil on canvas, 169.5 x 216.5 cm; The Hague, Mauritshuis

Frans Hals

Regents of the Old Men's Almshouse
1664
Oil on canvas, 172,5 x 256 cm
Frans Halsmuseum, Haarlem

René Descartes
c. 1649
Oil on panel, 19 x 14 cm
Statens Museum for Kunst, Copenhagen

Regents of the St Elizabeth Hospital of Haarlem
1641
Oil on canvas, 153 x 252 cm
Frans Halsmuseum, Haarlem

Vermeer

Friend of i van Leeuwenhoek, he was born in the same year, 1632, and lived in the same town, Delft.

The Astronomer
Paris, Louvre
50x45 1668

The Geographer
Frankfurt, Steadelsches Kunstinstitut
53x46 1668-69