Prime Time – Travelling with a Roman Portable Sundial

The special presentation Vitrine EXTRA, which periodically showcases different ancient objects as temporary additions to the permanent exhibition of the Kunsthistorisches Museum's Collection of Greek and Roman Antiquities, focuses in its ninth edition on a Roman Portable Sundial. This is how we learn how portable sundials worked and just how accurately – or inaccurately! – they were able to tell the time.