This collection is the 2nd issue in the series "Problems of the Ancient and Medieval History of Chach." The collection includes the latest research by scientists of Uzbekistan on ancient and medieval history, archeology and numismatics of Chach. The collection consists of three parts. The first part of the collection includes studies on the archeology of Chach. The second part of the collection includes research on numismatics. The third part of the collection includes critical and analytical articles on the history of Chach.