new Mies buildings rose across campus, including the S.R. Crown Hall, which houses the architecture school, and was designated a National Historic Landmark in 2001. Although Mies had emphasized his wish to complete the campus he had begun, commissions from the late 50s onward were given to Skidmore, Owings & Merrill (SOM), prompting Mies to never return to the campus that had changed architecture the world over. SOM architect Walter Netsch designed a few buildings, including the new library that Mies had wished to create, all of them similar to Mies's style. By the late 1960s, campus addition projects were given to SOM's Myron Goldsmith, who had worked with Mies during his education at Illinois Tech and thus was able to design several new buildings to harmonize well with the original campus. In 1976, the American Institute of Architects recognized the campus as one of the 200 most significant works of architecture in the United States. The new campus center, designed by Rem Koolhaas, and a new state-of-the-art residence hall designed by Helmut Jahn, State Street Village, opened in 2003. These were the first new buildings built on the Main Campus in 32 years. Illinois Tech opened its first new academic building in nearly 40 years in October 2018, when it dedicated the Ed Kaplan Family Institute for Innovation and Tech Entrepreneurship. In 1976, American Institute of Architects named the Illinois Tech campus one of the 200 most significant works of architecture in the United States. Mies Campus was added to the National Register of Historic Places in 2005. Sustainability In 2010 Illinois Tech received the Princeton Review's highest sustainability rating among universities in Illinois, tied with the University of Illinois at Urbana–Champaign. Notable buildings S. R. Crown Hall S. R. Crown Hall, erected in 1955, was considered by Mies to be one of his greatest architectural achievements. To provide for a flexible, columnless interior, he suspended the roof from four steel girders supported by eight external columns spaced 60 feet apart. S. R. Crown Hall, home to Illinois Tech's College of Architecture, has been described as an "immortal contribution to the architecture of Chicago and the world." S. R. Crown Hall was granted National Historic Landmark status in 2001. A $15 million renovation, completed in August 2005, modernized the structure with energy-saving mechanicals and windows, along with needed technology upgrades for computers and the Internet—all while carefully preserving the