Grimmwelt Kassel, Modern museum building in Kassel, Germany.

Grimmwelt Kassel is an exhibition house clad in a facade of horizontally laid, rough-hewn light grey stone blocks of varying lengths. Metal letters on the left side of the wall read GRIMMWELT, WELT and KASSEL, each followed by a vertical row of small tally marks. At ground level on the right, a wide glazed entrance with a dark metal frame opens into a foyer where a green GRIMMWELT sign is mounted on a dark wall panel.

The museum opened in 2015 to preserve and present the manuscripts of the German Dictionary and Children's and Household Tales by the Brothers Grimm. The collections document decades of intensive linguistic and literary work from the 19th century.

The 25 exhibition sections are named after words from the Grimms' Deutsches Wörterbuch, running from Ä (Ärschlein) to Z (Zettel), and large illuminated letters mark each themed room. The café-restaurant Falada takes its name from the talking horse in the Grimms' tale Die Gänsemagd. The house calls itself an Ausstellungshaus rather than a museum.

The exhibition occupies the two lower floors, while the foyer, shop and Café-Restaurant Falada are on the ground floor and special exhibitions on the upper floor. The freely accessible roof terrace, 2,000 m² in size, is reached by two open staircases at the front and rear or by lift from the foyer. The glazed entrance sits at ground level on the right of the stone facade.

During construction in spring 2014, workers found a poultry shear, bowls and gilded glasses from the Henschel family villa on the Weinberg, destroyed in the Second World War. About 450 fragments were reassembled into roughly 180 objects, now among the exhibits.