Newman was known for his exquisite collection of French impressionists, which included
A View of the Waterloo Bridge and the garden landscape T
he Garden of Monet’s House in Argenteuil (
Le repos dans le jardin, Argenteuil) by
Claude Monet,
The Pastel Dancer, Tying her Sandal by
Edgar Degas and
Édouard Manet's
Still Life Nuts and Apples in a Bowl and Die Badenden. Other works by French artists in the collection included
Moulin de Bonnevaux by
Gustave Courbet and
Provençal Landscape with a Red Roof and Chestnut Trees in the Park of Jas de Bouffan by
Paul Cézanne. Newman also owned the painting
Pot with Zinnias by
Vincent van Gogh and
Ferdinand Hodler's
Lumberjack and
Forest Interior in Reichenbach. On the recommendation of the Hamburg district court director and art critic Gustav Schiefler, the paintings
Seascape and
Village Street by
Edvard Munch were also added to Newman's collection. He also collected German artists:
Schimmel im Grünen by
Fritz von Uhde and
Landscape near Bernau by
Hans Thoma,
Snow Painting by
Hans Olde and
Hemsbach Castle, and
View of Frauenchiemsee Monastery by
Wilhelm Trübner. Newman was personally known to Ludwig von Hofmann, who visited him in Hamburg in 1904. His paintings
Reiter am Strande and
Frühling were also part of the collection. In addition, Newman commissioned pictures from young Hamburg artists with whom he was known or friends, purchasing the Alstertal landscape by Ernst Eitner or Schafe, Duck and the double portrait of Henry Hartwig and Isa Newman by
Julius von Ehren, as well as works by Arthur Siebelist and Julius Wohlers. While Newman resold most of the Hamburg artist's paintings, he kept the paintings of his friend
Leopold von Kalckreuth until his death. These included the painter Gamper, playing the cello, evening on the balcony and Eddelsener Garten in May, as well as the portraits of his relatives,
Henry Hartwig Newman,
Maria Louisa Newman as a child and Maria Louisa Newman as a young woman. Newman owned many artworks by
Max Liebermann, who frequently visited the Newman house and who painted in 1910 a portrait of his wife Maria Newman. The portrait of Henry Percy Newman began by Liebermann shortly before the sitter died in 1917. Other Liebermann works in the collection were
Corso on Monte Pincio, G
arden bench under the chestnut tree, G
arden in Noordweijk-Binnen, H
unter in the dunes near Noordwijk, G
oatherd in the dunes, T
he flower terrace in the Wannsee garden to the north-west, T
he kitchen garden to the north-west and a version
of The parrot man and the pastels
Unter den Linden and
grooms on the beach. File:Edouard Manet - Banhistas no Sena (Academia).jpg|Édouard Manet:
Die Badenden File:Claude Monet - Le repos dans le jardin, Argenteuil.jpg|Claude Monet:
Le repos dans le jardin, Argenteuil File:Edgar Degas - Danseuse rajustant sa sandale.jpg|Edgar Degas:
Tänzerin, sich die Sandale bindend File:Van Gogh - Vase mit Zinnien.jpeg|Vincent van Gogh:
Vase mit Zinnien File:Paul_Cézanne_-_Paysage_au_toit_rouge_ou_Le_Pin_à_l'Estaque.jpg|Paul Cézanne:
Provençalische Landschaft mit rotem Dach == Looted art ==