Hi Raja,

Ludwig Mies van der Rohe (March 27, 1886 – August 17, 1969) was a German-American architect who is called as pioneer of modern architecture.

Along with him, Le Corbusier, Walter Gropius, and Frank Lloyd Wright are also regarded as the pioneers of modern architecture.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!