The Former Royal College of Vercelli, now home to the State Archives of Vercelli, Italy, has been awarded the 2025 EuChemS Historical Landmarks Award at European Level.
The site is closely associated with Amedeo Avogadro (1776–1856), who taught physics and mathematics there between 1809 and 1819. During this period, he developed the ideas leading to his famous 1811 hypothesis, stating that equal volumes of gases, at the same temperature and pressure, contain the same number of particles.
This concept became one of the foundations of modern chemistry and contributed to the development of the mole as a way of relating measurable amounts of substances to the number of atoms or molecules they contain.
The EuChemS Historical Landmarks Award plaque will be officially unveiled on 14 December 2026 in Vercelli, recognising the historical importance of the site and Avogadro’s contribution to modern chemistry.
