Which building holds the title of the tallest old-style masonry bearing wall building in the United States?

The Monadnock Building is recognized as the tallest old-style masonry bearing wall building in the United States. Completed in 1891, it showcases the characteristics of load-bearing masonry construction, where the walls themselves support the structure without relying on an internal framework. This design was prevalent in its time, particularly before the rise of steel frame construction.

At 16 stories high, the Monadnock Building demonstrates innovative architectural techniques, including its thick masonry walls that provide structural stability, especially notable in the lower sections. As the building was designed to accommodate a variety of tenants, its layout reflects early modernist principles while remaining firmly rooted in traditional construction methodologies.

In contrast, the Wainwright Building, Empire State Building, and Flatiron Building, while iconic and significant in terms of their architectural contributions, do not surpass the Monadnock in terms of height related to old-style masonry bearing wall constructions. For instance, the Empire State Building is renowned for its height but is a steel-framed skyscraper, moving beyond the traditional masonry methods that define the Monadnock.