The rebuilding of the historic city, 85% of which was destroyed, was the result of the determination of the inhabitants and the support of the whole nation. The reconstruction of the Old Town was a coherent and consistently implemented project devised at the Warsaw Reconstruction Office in the years 1945-1951. Criterion (vi): The Historic Centre of Warsaw is an exceptional example of the comprehensive reconstruction of a city that had been deliberately and totally destroyed. Since then, the Historic Centre of Warsaw has fully retained its authenticity as a finished concept of post-war reconstruction. Protection and management requirementsThe Historic Centre of Warsaw is an area subject to legal protection and conservation based on Polish legislation.