In which architectural style are large panes of glass and thin planes utilized to create the building's form?

The architectural style that prominently features large panes of glass and thin planes to define a building's form is the International style. This style emerged in the early 20th century as a response to the decorative approaches of the past, embracing minimalism and functionality. The International style is characterized by its emphasis on volume over mass, an open interior space, and an absence of ornamentation.

Large glass panels are often used to maximize natural light and create a seamless connection between the indoor and outdoor environments, promoting transparency and a sense of openness. The use of thin structural elements further enhances the aesthetic of lightness and sleekness, allowing buildings to maintain a modern and clean appearance. Prominent examples of this style can be found in buildings designed by architects such as Ludwig Mies van der Rohe and Le Corbusier.

This focus on simplicity and the innovative use of new materials aligns with the principles of the International style, distinguishing it from the other architectural styles presented.