In 1736, Leonard Euler studied the network of bridges over the river Pregolya, which connected parts of the city Konigsberg in Prussia (now Kaliningrad, Russia). The seminal results of this study are generally accepted as the start of graph theory. (Scan of the original publication)

Starting in 2007, Pregolia is dedicated to adopt the latest in graph theory to bridge academic communities by providing transparent social networking services. Pregolia users will be able to explore academic institutes, subject areas, meetings and periodicals of their interest, building upon the social networks in these communities.