Applicable regulations and ordinances in librarianship are: Zakon o knjižnicama i knjižničnoj djelatnosti, Zakon o zaštiti i očuvanju kulturnih dobara and Pravilnik o zaštiti knjižnične građe. In Pravilnik o zaštiti knjižnične građe are the more specific security measures are specified, eg library buildings must be arranged and equipped with an anti-burglary system and/or surveillance system, entrances to the building must be illuminated, etc. A neat exterior and interior space are of special importance because it creates the first impression of the institution and is a clear indicator of active care and supervision of the space. It is necessary to be especially careful at exhibitions because rare and valuable material is being exhibited. Preventive security measures are important, such as alarm systems, behavioural instructions, etc., and staff training, and in recent years, RFID technology has made a significant contribution to the issue of security in libraries. The Library of the Faculty of Humanities and Social Sciences of University of Zagreb is the second largest library in the Republic of Croatia and that is why security measures are especially important. The Library implements all legally regulated security measures, has an alarm, fire protection system, video surveillance, locks the premises regularly, uses RFID technology, and the like.