The Guaranty Building, formerly called the Prudential Building, was designed by Louis Sullivan, and built in Buffalo, New York. Louis Sullivan Louis Henry (Henri) Sullivan (September 3, 1856–April 14, 1924) was an American architect, called the father of modernism. He is considered by many as the creator of the modern skyscraper, was an influential architect and critic of the Chicago School, and was a mentor to Frank Lloyd... A buffalo is one of several species of bovine. ... Official language(s) None, English de facto Capital Albany Largest city New York City Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 27th 141,205 km² 455 km 530 km 13. ...