Which architect is known for modernist buildings in Chicago, including those at Federal Plaza?

Mies van der Rohe is widely recognized for his significant contributions to modernist architecture, particularly in Chicago. His work is characterized by a minimalist style that emphasizes simplicity, functionality, and the integration of buildings with their environment. Federal Plaza, one of the notable locations in Chicago, showcases some of his iconic designs, including the Federal Building itself.

Mies van der Rohe's approach to architecture not only involved innovative use of materials like steel and glass but also an emphasis on open spaces and the concept of "less is more." His influence on the Chicago skyline and his legacy in modern architecture can be seen in various buildings throughout the city, embodying the principles of modernism that he championed.

The other architects listed, while notable in their own right, did not primarily focus on modernist principles in Chicago. Lewis Kahn is recognized for his monumental structures and use of materials but is not associated with Chicago's modernist buildings. César Pelli, known for designs such as the Petronas Towers, had a different architectural style and focus. Frank Gehry is known for his deconstructivist approach, which contrasts significantly with the principles of modernism that Mies van der Rohe epitomized.