What architectural feature is prominently displayed in the design of the Louvre's east façade?

The choice highlighting classicizing symmetry as a prominent feature of the Louvre's east façade reflects the architectural principles derived from classical antiquity, which emphasize balance, proportion, and harmony. This façade showcases elements such as evenly aligned windows, columns, and a centralized entrance that exemplify these ideals. Designed during the Renaissance, the Louvre's architecture draws inspiration from classical Roman and Greek structures, embodying a renewal of interest in symmetry characteristic of that period.

In contrast, elements such as curvilinear details might appear decorative but are not the primary focus of the east façade, while Gothic arches are associated with a different architectural style more prevalent in medieval structures. Modernist elements, which reject traditional forms for simplicity and function, do not apply to the Louvre's east façade, as its design honors historical styles rather than modern interpretations.