Sometime in the middle of the thirteen century, the monk Matthew Paris created a diagram using ink and various pigments to illustrate his route from London to Apulia. In doing so, he created a document which forms part of the cartographic history of a city that would grow exponentially over the coming centuries. This document, along with thirty nine others, form part of the online exhibit, London: A Life in Maps. Created by staff members at the British Library, visitors can click on an interactive map (rather appropriately) to locate these various maps which go all the way up to the 21st century. Another fun feature on the site allows users to download a Google Earth layer that includes a selection of these maps, including one of Regents Park in 1841 and a plan of the London Docks from 1797. The site is rounded out by an area where visitors can send electronic cards to friends and colleagues that incorporate images from these maps.