Stichting Restaura

Restoration and conservation of archaeological objects.

Restaura specializes in archaeological preservation and restoration objects. We work with all types of metals, glass, wood, leather, pottery and stone. We work for museums, archaeological services and excavation companies, among others. We have a well-equipped restoration workshop with extensive facilities. Our people are archeologically savvy and have great knowledge and experience as conservators. Together with the archaeological depot of the province of Limburg, Restaura has moved to one new location in Heerlen; The discovery. In the former library on the Raadhuisplein established the archaeological epicenter of the province. The area surrounding the building will be transformed into a Roman quarter together with the new Thermen Museum.

About Restaura

Restaura focuses on the treatment and research of archaeological objects. We work on objects made of various materials such as metal, glass, wood, leather and pottery and combinations. We have the necessary facilities in our restoration workshop to carry out proper conservation and restoration and research. Our team consists of eight specialists with a thorough knowledge of restoration and archeology. They have undergone university and / or internal practical training. Next their discipline in the restoration profession, they have related knowledge such as the manufacturing replicas, making X-rays or performing XRF analyzes. Our archaeologists can carry out block salvages in the field so that complex finds in the restoration studio can be further elaborated. To keep abreast of developments in the field of restoration technology and material knowledge, we maintain a good relationship with colleagues at home and abroad. We strive to optimally treat and handle objects entrusted to us surrounded with the utmost care.



The pottery is carefully cleaned beforehand. We remove previously applied glues and additions. If necessary, pottery can be used for stability impregnated. We can replenish incomplete objects. The additions are colored if desired. As much as possible is used during the restoration reversible materials.


The preservation and restoration of glass objects starts with a thorough cleaning of the surface and the fractures. Depending on the condition, the glass is impregnated. Loose parts are fixed in the correct position and glued. If desired, we can missing parts supplemented.


Wood is first cleaned against salts, bacteria and fungi. We impregnate wood with PEG and then freeze-dry it. If necessary, the objects will be a undergo surface treatment. The surface is glued, supplemented and reinforced where appropriate. Complex finds such as a well are combined into one whole a support construction is installed.


Pre-cleaning leather is necessary and makes things visible such as sewing holes and signs of use. It is then treated with a biocide to prevent contamination bacteria and fungi. For preservation, leather is impregnated with PEG and freeze-dried. Any fractures or loose parts are glued. Objects out multiple parts are put together into one whole.


Metals need specific conservation. Iron is desalinated for the corrosion process to counteract. Copper alloys are treated against bronze rot. After preservation, metal objects are broken into their original parts place restored and fixed. Where necessary, missing parts are made for reinforcement provided with a supplement. If necessary, the corrosion is removed up to the original surface. The objects are provided for protection against external influences of a final treatment with micro wax.


In the case of stone objects such as sarcophagi, the surface is first if possible cleaned. Organic deposits and sand are removed so that the surface does not go mold. In case of a damaged surface, the object is used for reinforcement impregnated. Fractures and open cracks can be done by injection are glued. Completing missing parts is also an option. The additions are retouched according to the original surface.


Our team consists of specialists with a thorough knowledge of restoration and archeology. They have completed university and / or internal practical training. Besides their discipline in the restoration profession, they have related knowledge such as manufacturing replicas, X-ray imaging or XRF analysis. Our archaeologists can perform block salvages in the field so that complex finds can be found in the restoration workshop can be further developed.

Permanent employees

Ton Lupak Function: Director

Astrid Smeets-Verwey Function: board member & conservator

Niels Stoffels Function: board member & archaeologist

Jean-Paul Geusen Function: Employee restoration workshop (leather, wood)

René Nabben Function: Employee restoration workshop (metal)

Corinna de Regt Position: employee restoration workshop (glass)

Eef Ewalds Position: employee restoration workshop (ceramics)

Contact Raadhuisplein 20 6411 HK Heerlen – mail: –  tel: 045-2031093 –

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