The John F Kennedy Library and Museum is unlike the first two designs I came across. The Louvre Museum and the Bank of China were both very modern looking, with sharp edges and straight lines throughout the design. Granted, those were made in the late 80’s and early 90’s while this building was completed in 1979. 
In the places where glass and steel are used, it does still use straight lines and even pyramid shapes near the edges. The building was made a tribute to the late President Kennedy of course, and I.M. Pei was chosen by Jacqueline Kennedy who saw potential for creativity in the architect. The structure of the glass that rose with the tower was hollow and supported by strong geometric shapes, representing reflection on void. 
