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However, systems grow old and processes become outdated unless they are continuously re-engineered, improved, and modified. Hence, we see the influence wielded by the systems and processes of the assembly line perfected by Henry Ford for the production of Model-T, which was then replicated across industries and which became the signature of the mass production sysem of the Industrial Age. Leaders worrying about continuity of their control processes, establish the legacy of systems. Unlike the building which is rooted in a particular time and place, a system has a life of its own and has the ability to replicate itself and perpetutate itself in other structures and move across time and place, and across cultures. Taj Mahal as a symbol of love exerts the influence of beauty and perfection through its architecture. Buildings are often the first creation of a leader's enterprise and is a reflection of how he wants himself to be remembered. Whether these are the Pyramids of Egypt or Taj Mahal and Qutub Minar in India, or the Süleymaniye Mosque in Turkey, or the Eiffel Tower of Paris, they stand for a long time inspiring people with their architecture and the history of the people who created them. We see great monuments and buildings that remind us of the leaders. Legacy of a leader can be of four types: Legacy of buildings, legacy of systems and processes, legacy of people, and legacy of ethical values. They think about a legacy that is memorable and whose reach would extend beyond their time. Leaders often think beyond themselves or their children. Others focus on their children and try to make them better than themselves. Many focus on accumulating wealth and leaving behind property and bank balance. There is a yearning in us to leave behind a legacy.