The inventory of the Ilkhanid monuments in Iran, that have nowadays lost their original decorations, encourages the development of several methodological approaches, among which the field research is central. At the same time, the thousands of remaining tiles, some of which have only recently been discovered, are often difficult to connect to a specific monument.Based on the observation of these gaps and shortcomings, our contribution will focus on two points:- Mapping of recent discoveries (sites not recorded by O. Watson [Persian Lustre Ware, 1985]: Zulfabad, Aveh, Alamut) and on-going researches (Sultaniya, Eghvard, Qalhat).- Survey of monuments that have or had lustre tile decorations: case studies and general contributions based on remaining findin