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Paintings conservator Kathrin Pilz has been working for over a year on removing the varnish layer that was applied to the painting Olive Grove (1889) during a previous restoration treatment in 1933.

The bright colours as chosen by Van Gogh can now be perceived once again. Pilz conducted comprehensive research into Van Gogh’s paintings of olive groves before restoring Olive Grove at the Van Gogh Museum.

Van Gogh’s paintings of olive groves

During his time in the South of France, Vincent van Gogh devoted himself to painting olive groves. These olive trees were growing around the asylum in Saint-Rémy, where the 36-year-old artist stayed for a year due to his mental health issues. Van Gogh found comfort and strength in nature, and in painting the gnarly shapes of the olive trees.

He was fascinated by the varied colours of the trees, caused by the constantly changing light. Vincent masterfully captured their characteristic, twisting branches and trunks, using swirling brushwork, strong contours and stylised blue-purple shadows. The painting Olive Grove in the Van Gogh Museum collection is one of fifteen that he made of the olive trees.

The restoration of Olive Grove was made possible by the generous support of Kikkoman.

The painting Olive Grove by Vincent van Gogh during the varnish removal: the varnish has been removed from the right-hand side of the picture, in the air, the trees and the foreground (to the right of the dashed white line).

Vincent van Gogh, Olive Grove, Saint-Rémy-de-Provence, November 1889. This is the painting during the treatment. The varnish has been removed from the right-hand side of the picture, in the air, the trees and the foreground (to the right of the dashed white line).

Detail of Olive Grove under the microscope. On the left half the varnish is still present, on the right half it has been removed

Microscopic detail of Olive Grove. On the left half the varnish is still present, on the right half it has been removed

Paintings conservator Kathrin Pilz removes the varnish layer of Olive Grove with fine tools under the microscope. Photo: Isabell Janssen.

Paintings conservator Kathrin Pilz removes the varnish layer from Olive Grove using fine tools under the microscope. Photo: Isabell Janssen