The present volume is published within the framework of the project "Reconstruction of the Onbashieva House as part of the Vasil Levski National Museum in Karlovo and popularization of the life and deed of the Bulgarian national hero Vasil Levski as part of the European cultural heritage". The project is realized within the framework of the European Economic Area Financial Mechanism. The principal donors of this project are Iceland, the Principality of Liechtenstein and the Kingdom of Norway which provides 95% of the funding. The beneficiary of the project is the Municipality of Karlovo and it is implemented in partnership with Vasil Levski National Museum in Karlovo, Vasil Levski Foundation, the Municipal Agency for Sustainable Development in Karlovo, and the Bulgarian-Norwegian Society.