Book excerpt: This book constitutes selected and revised papers from the Second International Conference on Research and Education in Urban History in the Age of Digital Libraries, UHDL 2019, held in Dresden, Germany, in October 2021. The 11 full papers presented in this volume were thoroughly reviewed and selected from 41 submissions. They are organized in the topical sections on ​theory, methods and systematization; visualization and presentation; machine learning and artificial intelligence.- policies, legislation and standards.