The central organisation around which Polish cooperation with UNESCO on implementing the World Heritage Convention has been concentrated from the beginning is the Polish National Committee ICOMOS.The cooperation has been organised by institutions and people connected in some way with the Committee. Specialised institutions were gradually joining the cooperation. One example of such measures was the appointment of the Board of Historical Gardens and Palaces Conservation, transformed subsequently into the Centre for the Protection of Historic Landscape in Warsaw. A „garden” conservation society has gathered around this institution, composed of art historians, landscape architects, architects and gardeners. They have been carrying out interdisciplinary works concerning historic gardens and cultural landscapes in Poland. Their cooperation with the Polish National Committee ICOMOS andthe International Committee of Historic Gardens and Sites ICOMOS – IFLA was connected with the activities of UNESCO. Major activities of the Centre include: valuation and assessment of cultural landscapes for the World Heritage List; drawing up, in collaboration with the Fürst-Pückler-Park Bad Muskau Foundation, an application for the inscription of Park Muskau in the UNESCO World Heritage List; organisation of international conference: „The Regional Expert Meeting on Cultural Landscapes in Eastern Europe” in Białystok in 1999 at the request of WHC UNESCO; organisation of international conference „Cemetery Art” in 1993 at the request of WHC UNESCO, along with accompanying exhibitions concerning specific issues, organised by the Board of Historical Gardens and Palaces Conservation in Warsaw.