Investigations of the spheres’ inner structures with CT scans, X-rays, watermark studies, colour pigment analyses and stratigraphy rounded out the information already gleaned.

A strategy and more high-tech tools

June 2013
Experts from UNIL’s School of Forensic Science (ESC) are asked to devise a coherent strategy for further testing […]


A delicate trip to the CHUV

June 2013
The globes are taken to the Radiodiagnostics and Interventional Radiology department of the Lausanne University Hospital (CHUV) for a tomodensitometry (CT) scan. How will this first major transfer be handled ? […]


CT scan of the structure

June 2013
A series 578 computer tomodensitometry images were made of the terrestrial globe and 572 of the celestial globe to help better understand the spheres’ inner structure […]


X-rays of the structure

June 2013
At the Swiss Institute for Art Research (SIK|ISEA), Danièle Gros further analyses the globes’ structure using X-ray technology. This method highlights a number of additional details […]


Heterogeneous surfaces

March and June 2014
In a step that is indispensable for restoration work, UV fluorescence is used by Prof Dobruskin and Dr Scherrer of the Graduate School of the Arts in Bern (HKB|HEAB) to distinguish details of the spheres’ multi-layered shells […]


Surfaces and pigments

June 2014
A battery of scientific methods is brought to bear to determine what kinds of pigment were used to print the globes. The final report concludes that all the identified components were available in Mercator’s time […]


Stratigraphy of the spheres

The successive layers forming the shells of the two spheres are studied by Karin Wyss, Dr Stefan Zumbühl, Nadim Scherrer and Margaux Genton at the Swiss Institute for Art Research in Zurich […]