This thesis focuses on the history of plaster and plaster casts in art, as well as the issues regarding their conservation. The Louvre museum in Paris founded a plaster cast workshop in 1794. In 1927 the National Gallery of Slovenia bought a collection of 62 plaster cast copies of ancient sculptures from the Louvre plaster cast workshop. Part of this collection was later lent to other institutions, including the Academy of Fine Arts and Design of the University of Ljubljana. Many of the plaster casts remain to this day at the Academy, stored in inappropriate conditions, with their state continually worsening. This thesis includes a list of the casts located in the Academy with basic information and photographs. Three selected casts were examined and their state of conservation is reported in more detail. Lastly, the conservation-restoration treatment on the cast of Aphrodite (NG P 922) is described.
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