Software architecture diagrams and metrics are wellknown and heavily used in many areas in software engineering. However, they are rarely combined in one (visual) representation. Although there are some advances in this direction, there are also some limitations. In this research, we study how to overcome these limitations. Specifically, we are interested in visualizing metrics on several levels of detail (classes, methods, groups of classes) on UML-like diagrams in a scalable and intuitive way. We present the results obtained in the first three years of the PhD track and outline ongoing work.