The theme of this master's thesis revolves around the issues of preserving and protecting industrial heritage, primarily through the example of the Zagreb Tobacco Factory, which is one of the significant instances of industrial heritage from the second half of the 19th century, with exceptional historical, cultural, architectural and building value. Alongside a historical overview and architectural analysis of the Tobacco factory in Zagreb, the thesis explores and analyzes the initial adaptation project of former factory into the Croatian Historical Museum, which was halted due to certain political and financial reasons. Currently, there is an ongoing project for an adaptation of Tobacco factory Zagreb into the Croatian Restoration Institute building, for which a report on conservation and restoration research conducted on the structure has been prepared. Therefore, the final subsection of this thesis will focus on describing and analyzing this conservation report, which is based on extensive research and documentation that further valorizes the former Tobacco Factory Zagreb and provides reccomendations for its future restoration. Today, in the Zagreb area, there are numerous abandoned and neglected industrial heritage sites that are slowly deteriorating without adequate protective measures. Their architectural and historical value, as well as their cultural significance, are insufficiently recognized, primarily due to the lack of public awareness and the relevant authorities, who are crucial stakeholders in the preservation processes of industrial heritage. Therefore, one of the objectives of this master's thesis is to investigate whether there is an adequate system for preservation of industrial heritage in Croatia, how industrial architecture and heritage preservation are approached, and what potential challenges arise during the revitalization process.