The subject of this diploma work is an oval shape panel painting, under the name „Glava sveca“ („The head of a Saint“) dimensions 15.5 x 12.2 x 0.6 cm by an unknown author from the Croatian Historical Museum in Zagreb. Before its tranfer to the Department of Conservation and Restoration of Art it was stored in a metal cabinet drawer in depot at the Croatian Historical Museum. „Glava sveca“ was donated to the Museum together with another oval panel painting of the same dimensions, theme and name. With expert guidance of mentor Associate Prof.art. Jagor Bučan, co-mentor (As.) Barbara Horvat-Kavazović and the lead professor of the Conservation and Restoration of Easel Paintings Associate Prof.MA Tamara Ukrainčik, a comprehensive conservation and restoration work was carried out on the painting. The structure of the diploma work is divided in three parts: the exploratory part, practical part and making the copy of the painting. Art-historical circumstances of the painting were described in the first part. The second part of the diploma work was practical and it consists of conservation and restoration works on the painting followed by detail written documentation, photodocumentation, instrumental and laboratory analysis of samples made by the Croatian Conservation Institute and the Department of Conservation and Restoration of Art. It has been decided to do works on the painting using the so called „museum approach“ which means that only the most necessary steps in regards to conservation and restoration will be done on the painting and the painting will be presented in its current state of preservation. Considering the ethical code of the profession, this way of presentation is the most adequate. The third part of the diploma work refers to making a copy of the painting „Glava sveca“ that will follow the originally stratigraphy of the painting (support, preparation, ground, impregnation, paint layer, varnish).