The collection, continually added to that formed by Lugt, includes works by Dutch, Flemish, Italian, French, Danish, British, German artists, and features over 7,000 Old Master drawings, 15,000 prints, and 450 paintings. The drawings date from the 15th to the mid-19th century and mainly concern the Dutch and Flemish schools of the 17th century (
Rembrandt,
Samuel van Hoogstraten,
Lambert Doomer,
Ferdinand Bol), but there are also works from France (
Claude Lorrain,
Antoine Watteau,
François Boucher), Italy (
Domenico Beccafumi,
Sebastiano Ricci,
Tiepolo, Germany, Denmark and England. The prints are also dominated by Dutch and Flemish masters of the 16th and 17th centuries. Particularly noteworthy are prints of almost all of Rembrandt's etchings, rare engravings by
Lucas van Leyden, portraits of artists, Italian, German and Dutch woodcuts, and high-quality French portrait etchings. The foundation also holds a collection of some 450 paintings. The first part consists of works by Dutch and Flemish painters of the sixteenth and seventeenth centuries. All genres are represented, from portraits to still life, genre scenes and landscapes. Among the paintings are church interiors by
Pieter Saenredam and
Emanuel de Witte, genre scenes by
Jan Brueghel the Elder,
Joos van Craesbeeck,
Willem Kalf,
Jan Steen and
Esaias Boursse, scenes from sacred history by
Herri met de Bles,
Gillis Mostaert,
Joachim Beuckelaer,
Pieter Lastman,
Thomas de Keyser and
David Teniers the Younger, and still lifes by
Jan Davidsz. de Heem,
Jacob van Es,
Ambrosius Bosschaert the Younger,
Willem Kalf and
Jan van Kessel, seascapes by
Ludolf Backhuysen, Dutch landscapes by
Hendrick Avercamp, Esaias Van de Velde the Elder, Jan van de Velde the Younger,
Jacob van Ruisdael,
Jan Lievens,
Aert van der Neer,
Jan van Goyen,
Paulus Potter,
Jan Both,
Aelbert Cuyp and
Gerrit Berckheyde, Italian landscapes by
Cornelis van Poelenburgh,
Nicolaes Berchem,
Karel Dujardin, portraits by
Jan Antonisz van Ravesteyn,
Jan de Bray,
Caspar Netscher,
David Teniers the Younger and
Nicolaes Maes. Other schools and painters from later centuries are represented by works from
Sofonisba Anguissola,
Paolo Porpora,
Jacques Linard,
Nicolas de Largillière and
Francesco Guardi. The second part, of almost 300 paintings, is devoted to 19th century European painting. These are mainly oil sketches, landscapes executed in the open air. The collection of artists' letters, developed especially after Frits Lugt, is one of the most important in the world with more than 40,000 items dating from the
Renaissance to the present day. It also includes correspondence from collectors and art connoisseurs. Letters from French artists of the 17th and 19th centuries predominate. Among the famous artists, the foundation holds letters from
Michelangelo,
Albrecht Dürer,
Rembrandt,
Jean-Georges Wille,
Paul Gauguin,
Henri Matisse and Dimitri Bouchène. Finally, the Fondation Custodia has smaller collections of Indian miniatures, miniature portraits, old books (particularly 17th century Dutch), original frames (1,000 pieces), Chinese porcelain and a few antique objects of Greek, Roman and Egyptian origin. ==References==