Sehr schöne Umsetzung der UB der Univ of Iowa:
The Atlas of Early Printing is an interactive site designed to be used as a tool for teaching the early history of printing in Europe during the second half of the fifteenth century. …
The Output by Location layer depicts data drawn from the Incunabula Short Title Catalog (ISTC) at the British Library. The layer is a visualization built from all of the date and location of printing data in the ISTC, and is regularly updated to accurately reflect ongoing changes in the ISTC’s records. Because this data is drawn largely unfiltered from the ISTC database, it is not an exact representation of the number of printed books in the fifteenth century.