This dissertation aims at supporting the studies on the Fifth Minaret of Herat, part of the complex of Musalla, strongly desired by Queen Gawhar Shad between 1417 AD. C. and 1432 d. C. (819-835 AH), is part of a framework of safeguard actions carried out by international organizations for protection, such as UNESCO and Aga Khan Trust for Culture. This thesis work is intended to support the studies conducted, and currently in progress, by the team of the Department of Architecture of the University of Florence, officially involved in the safeguarding action. In order to trace a method of approach to the issue of the protection and conservation of cultural heritage, the path of knowledge becomes a fundamental starting point, on which diagnosis and effective interventions will depend.