I.M. Pei

I.M. Pei designed 50 iconic landmarks across 5 decades and 6 continents, including the Louvre Pyramid (1989), which increased museum attendance by 60% to 4.5 million visitors annually, and the Bank of China Tower (1990) at 367 meters due to its diamond truss system. His East Building of the National Gallery of Art (1978) used 18,000 tons of pink marble, yet its budget of $94 million stayed 5% under initial projections. His Museum of Islamic Art (2008), completed at age 91, uses 1,000 limestone blocks and cost $300 million.