The History of the Concept of the Formal Sciences
| Giuseppe Primiero, Catarina Dutilh Novaes, Volker Peckhaus, Jens Høyrup |
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| Jessica Carter, Ladislav Kvasz |
| Johannes Emrich, Benedikt Löwe, Christian Thiel |
| Ladislav Kvasz, Walter Purkert (in the back), Dieter Lohmar |
| Charles Stewart, Daryn Lehoux |
| Christian Thiel |
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| Ivor Grattan-Guinness |
| Markus Werning |
| Ivor Grattan-Guinness |
| Charles Stewart, Norma Goethe |
| Olaf Neumann, Stefan Artmann |
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| Charles Stewart, Jean-Yves Béziau |
| Daryn Lehoux |
| Daryn Lehoux, Terese Nielsen, Jens Høyrup |
| Christoph Kann |
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