Figure 1 : Representation of the network connecting the medieval European and Asian cities through pilgrimage and commercial routes during XIV century.

From: Network theory may explain the vulnerability of medieval human settlements to the Black Death pandemic

Figure 1

Bubble size is proportional to the centrality value of the cities. Blue links indicate trading routes and white links indicate pilgrimage routes (note that many pilgrimage routes travelled across Europe are hidden by the more numerous trade routes). The spatial network and the map was built using R37 (see Supplementary Methods for the scripts).