The restoration of a panel attributed to Maarten De Vos - The Phoebus Foundation

Painting conservator Franziska Bunse, who has been a Fellow at The Phoebus Foundation for the past three months, is restoring a panel painting from the foundation’s collection under the expert guidance of Sara Mateu and in collaboration with Brian Richardson. This work is attributed to the circle of the Antwerp master Maerten de Vos (1532-1603).

Painting conservator Franziska Bunse removes old adhesive and surface dirt from the joint of a panel painting in preparation for the careful rejoining of the panels in the conservation studio.
Franziska at work removing non-original glue and dirt from a joint in preparation for carefully re-gluing the individual panels together

The painting depicts various scenes from chapter ten of the Acts of the Apostles, which tells the story of Saint Peter and the centurion Cornelius. Peter receives a vision in which the heavens open and a large sheet is lowered down. This sheet contains all kinds of animals that are considered unclean according to Jewish dietary laws. When Peter refuses to eat these animals, it is explained to him that nothing created by God is unclean.

Subsequently, two soldiers sent by the centurion Cornelius knock on Peter’s door to invite him to their master’s house. Peter accepts the invitation and goes with them. When he arrives at the centurion’s home, the centurion kneels before Peter, but Peter tells him to stand up, explaining that God has shown him that everyone is equal. In the end, Peter baptizes the centurion.

What is remarkable about this work is that the scenes are depicted from right to left.

Panel painting before restoration showing a crowded historical scene with figures, visibly darkened by surface dirt and disrupted by old panel joins and structural damage.
Before the restauration

The painting consists of four oak panels with a horizontal grain and measures 99 cm x 190.3 cm, giving it a relatively elongated format. Upon arrival at the conservation studio, the panel was in a very critical condition. The exact state of the paint layers was difficult to assess because a thick layer of dirt and a yellowed, non-original varnish completely covered the surface. The first step was to clean the painting, which became a challenge. Removing dirt, old varnish, and discolored retouches that had been on the surface for centuries had to be executed carefully to avoid damaging the original paint layers. Additionally, thorough tests were needed to determine the appropriate method. By cleaning the painting with a combination of various solvent gels and gentle mechanical techniques, the vibrant and intense color palette was revealed once more.

Panel painting during cleaning, with colours, details and figures gradually emerging as old varnish and surface dirt are carefully removed.
During cleaning
Detail during cleaning
Detail of a painting during cleaning, revealing the paint surface and figures beneath aged yellowed varnish.
After removing old overpaint (right half)
Detail of a soldier’s armour during restoration, where cleaning reveals the bright yellow paint beneath the surface.
The cleaning revealed the vibrant yellow of a soldier’s armor

The damage primarily affected the structure of the painting. Two joints (the top and bottom ones) were completely open, and many cracks weakened the panels.

Damage overview of a painting with joints marked in blue and cracks highlighted in yellow, used for documentation during conservation research.
Damage view: joints in blue and cracks in yellow

These damages also affected the paint layer, leading to loss. The structural damage was partly the result of, and certainly exacerbated by an old wooden strainer. This supporting structure, which was likely attached to the back of the painting in the 19th century, contributed to the deterioration.

Reverse side of a painting before restoration, showing the original wooden support with an old batten framework.
Back of the painting before conservation showing the old cradle

Although the restorers acted to the best of their knowledge at the time, this wooden strainer was not beneficial for the painting’s wooden support in the long term. Additionally, an old woodworm infestation locally weakened the panels. Under the guidance of Sara Mateu, we removed this old, dysfunctional wooden strainer

Franziska and Brian working in the conservation studio to carefully remove the old wooden batten structure from the reverse of a painting.
Franziska and Brian are carefully removing the cradle

To conserve the cracks and open joints and to properly re-glue them, the top and bottom panels were then dismantled.

Teamwork in the conservation studio as Sara, Franziska and Brian carry out structural treatment on a large painting together.
Sara, Franziska and Brian during structural work

At the moment, this restoration is still ongoing. The structural support requires further conservation, and filling and retouching the lost paint layers are yet to be addressed. Interested in seeing the results? Follow us on our website and social media to stay updated!