Although preservation is not a new concept and has been practiced for centuries, designating historic monuments, structures, and buildings as historically significant and preserving them is a new phenomenon, which brings us to a fairly simple question of knowing what to preserve and what not to preserve. The advent of new materials and advancements in construction technologies have significantly changed the style of construction from time to time, especially in the last two centuries. Although basic building materials like brick, wood, lime and stone have been used for centuries, the recent addition of concrete, steel and glass to this list has completely overhauled the way construction is done. buildings. Given the needs, scale and pace of construction imposed by rapid industrialization, the building style took on an unprecedented architectural form from the beginning of the 20th century. History of Preservation of Modern ArchitecturePreservation of modern architecture is unique in its own way and adds a whole new dimension of preserving old buildings. The big difference between building materials and traditional materials, the complexity of preservation and renovation add to the diversification of preservation. It is not only the difficulties of preservation, but also the indifference towards modernist buildings that constitute the main factor in neglect. “For all the talk of technical difficulties, it is actually the unpopularity of modernism that often poses the greatest challenge for advocates of postwar architectural preservation” (While 2007, 649). Unlike previous movements for the preservation, restoration and conservation of historically significant buildings. , the preservation movement of m...... middle of paper......buildings, which are the subject of current preservation efforts, are all equally relevant. (Prudon 2008, 21). The preservation of modern architecture itself challenges some of the fundamental concepts of historic building preservation. As the time scale of buildings shrinks, these challenges must be addressed taking into account the emergence of new construction modes and materials. Works Cited Prudon, Theodore HM Preservation of Modern Architecture. John Wiley & Sons, Inc., 2008. While, Aidan. “Modernism versus Urban Renaissance: Negotiating Post-War Heritage in England’s City Centres.” Urban Studies, Vol. 43, no. 13, 2006: 2399-2419. Whereas, Aidan. “The State and the Controversial Demands of Built Cultural Heritage: Modernism, Dirty Concrete and Post-War Grading in England.” Environment and planning B: planning and design, volume 34, 2007: 645-663.