This thesis presents the origin, development and influence of the English Heritage organization on heritage management in the United Kingdom, its activities, chosen paths and creations in the world of cultural heritage protection. The thesis highlights the struggle, commitment and expertise of English heritage and Historic England organizations, their importance for the heritage resources of the United Kingdom, the relationship and connection with cultural assets, the role of valorization and sustainable development in achieving progress in the field of protection, restoration and conservation of cultural heritage and understanding importance in defining the approach of teaching future generations about the unspeakable importance of preserving the country's cultural heritage. The most important aspects in the management of heritage and its resources, the most important projects for the purpose of restoration and sustainable use of the heritage sites of the United Kingdom, and the benefits and results in the profession resulting from international collaborations are briefly described. In order to gain a better insight into the diverse and complicated world of cultural heritage protection, a comparison was made between the United Kingdom and the Republic of Croatia in commitment and achievements in efforts to preserve cultural heritage and the way heritage is treated and the valorization of the regeneration process with the re-accumulation of heritage resources. The importance of stating the status of protection and preservation of cultural heritage in the Republic of Croatia was highlighted due to the desire to provide an insight into the considerable effort of the Croatian people in the field of preserving culture and heritage due to the origin of the author of this thesis and due to the desire to see further progress in the status of heritage in the Republic of Croatia, as well as for leaving a mark in the noble struggle for the cultural heritage of the Croatian people, against the international example of the United Kingdom.