Only what we see can be interpreted and analyzed, which is why data visualization aids the overview, interpretation and analysis of large amounts of data. Technological advances are continually offering new solutions, and the redevelopment of OMMIK’s MuzeumStat service is building on these new opportunities. During the development process, complex questions arose: what type of data should be visualized? Which method shall we choose? How can we resolve inconsistencies in the statistical reports? How can we keep pace with, in a simple but spectacular way, the constant change in the institutional system? The presentation introduces the design and development process of the revamped MuzeumStat site and presents its benefits and services to institutions, maintainers, researchers and journalists.