Dr Cornelis van Tilburg studied Classics at Leiden University. Since 2000 he is a researcher at Leiden University (LUCAS). His main publications are: Romeins Verkeer (2005, repr. 2014, third edition 2018), Traffic and Congestion in the Roman Empire (2007, repr. 2012), Streets and Streams: Health conditions and city planning in the Graeco-Roman World (2015) and Oudheid, reinheid en gezondheid: Hygiëne in de Grieks-Romeinse wereld (2018).