CPV code 92522200 designates Preservation services of historical buildings in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
92522200 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 92522000 (Preservation services of historical sites and buildings).