The title of this talk borrows from the title of a chapter in a recently published book by Richard Smiraglia, Cultural Synergy in Information Institutions (7.9: What if There Were a Map?). The use of visualizations in the exploration of bodies of knowledge and for the organization of knowledge has a long history. Think in terms of the tree(s) of knowledge and large-scale maps of science (see Atlas of Science by Katy Börner). This talk introduces the work of a European network of research collaboration (a so-called COST Action) KnoweScape. KnoweScape explores how knowledge maps (from simple to sophisticated) can be made and applied to better understand, navigate, and curate collections held by libraries and archives. In terms of general research methodology, this talk is also a plea for creating overview prior to in-debt analysis and to seek for relative stable reference frameworks against which rapid changes of our knowledge can be interrogated. Looking at results produced by this community of scholars so far, it will become clear why the making of knowledge maps requires the collaboration of physicists, computer scientists, sociologists of knowledge, digital humanities scholars, and information scientists and professionals.