The permanent collection at Kunst Haus Wien brings together Hundertwasser’s bold, imaginative world—from spiralling prints and colourful paintings to detailed architectural models and textured tapestries. Each piece reflects his belief in organic forms, individual expression, and a deep connection with nature, offering insight into both the artist and his ideals.

Hundertwasser’s belief that straight lines are unnatural is reflected in the museum’s vivid interiors, both in decor and build. Undulating mosaic-and-wood floors, asymmetrical windows, galleries with curving walls, and mismatched staircase bannisters make it as intriguing as the artwork it holds.

At Kunst Haus Wien, trees grow from windows, roofs are covered in greenery, and plants line the walls and corners. These “tree tenants” are a fundamental part of the museum’s structure, meant to flourish alongside humans and embodying Hundertwasser’s opinion that nature and humanity are interconnected and inseparable.

Hundertwasser created several architectural concepts for housing projects, many of which are displayed at the museum. His architectural models, like the astonishingly detailed “In the Meadow Hills”, depict dwellings with grassy roofs and streams flowing through them, showcasing his vision of incorporating nature into architecture.

Shaped by Hundertwasser’s environmental values, Kunst Haus Wien is Austria’s first “green museum.” The building runs on hydrothermal energy, focuses on reducing waste wherever possible, and includes foliage throughout its interiors, making environmental awareness and sustainability part of its design and day-to-day operations.

Café Friedlich, the museum’s cafe, feels like a garden courtyard, with a profusion of plants, colourful tiled floors, and quirky, mismatched seating—in other words, a typical Hundertwasser setting. Treat yourself to Viennese coffee and a snack in this green eatery, and relax amidst art and nature.