More than 200 years ago, a metre did not measure what it measures now. In 1790 France proposed to standardise the metric system to make it universal. For this the scientists needed to make measurements on the imaginary line of the 0º Meridian. This great project had three expeditions . A first one (1792-1798) ended in Barcelona; the second … Continue reading The Cabin on Top of the Montgó. How, Why and Where.