Architecture in Red: Memory, Industry, and Landscape at the Foot of Red Mountain

Designed by Mix Architecture, the Red Box is a compact cultural building located at the base of Red Mountain in Nanjing. Constructed entirely of red concrete, the project uses color as its primary architectural language, embedding historical memory, industrial heritage, and geological identity directly into its material and spatial logic.

Exterior view
Photo credit: Arch-Exist

Aerial view
Photo credit: Arch-Exist

Luminous wall
Photo credit: Arch-Exist

The building’s defining red hue carries three layers of meaning. The first is historical. The site forms part of Red Mountain Park, formerly the Nanjing Combat Machinery Factory established in the 1950s. As an industrial complex shaped during the formative years of the People’s Republic of China, the factory embodies a “red” political and social memory that has persisted across generations. The Red Box positions itself as a contemporary architectural response to this legacy, translating collective memory into built form.

Exhibition arrangement
Photo credit: Arch-Exist

Exhibition
Photo credit: Xiaobin LV

Exhibition
Photo credit: Arch-Exist

The second layer is architectural and material. The surrounding factory buildings are defined by red brick construction, and rather than replicating their appearance, Mix Architecture reinterprets their rhythm and scale through modern means. Red concrete is cast using wooden formwork, producing textures that recall the proportion and tactility of brickwork. This approach allows the Red Box to resonate with its industrial context while asserting a distinct, contemporary identity.

Night View Details
Photo credit: Arch-Exist

East Facade
Photo credit: Haiting Sun

Entrance space
Photo credit: Arch Nango

The third interpretation of red is geological. Red Mountain was not always known by its current name. Historically referred to as “Great Spectacular Mountain,” it acquired the name Red Mountain during the Republican era, when the reddish soil and the discovery of hematite drew attention to its mineral composition. Hematite’s primary component, iron oxide, is also the key additive that gives the concrete its red coloration. In this way, the building’s material is physically and symbolically derived from the mountain itself, anchoring architecture to landscape.

Exhibition Hall and Water courtyard
Photo credit: Arch-Exist

Water courtyard
Photo credit: Haiting Sun

Opening Reception
Photo credit: Yuanyuan Zhao

Spatially, the Red Box is organized through a carefully controlled sequence of solid and void. On the north side, a large, solid wall faces the park, presenting the building as a quiet, rectangular volume that appears to hover above a horizontal courtyard wall. To the south, stepped terraces recede toward the mountain, softening the building’s mass and opening it to the surrounding landscape. A triangular incision in the courtyard wall conceals the entrance, leading visitors along a winding path into a tall entry space oriented toward a folded staircase.

Inner courtyard
Photo credit: Arch-Exist

Stairs Space
Photo credit: Xiaobin LV

Stairs and external landscape
Photo credit: Xiaobin LV

The internal layout establishes a gradual transition from public to private. The western side contains the most public spaces and opens onto the project’s largest courtyard, where an existing mature tree is preserved. A reflecting pool and surrounding corridors capture reflections of trees and rippling water, visually drawing the forested slopes of Red Mountain into the heart of the building. In contrast, the eastern side accommodates more private functions, maintaining a quieter atmosphere.

The corridor on the second floor
Photo credit: Xiaobin LV

Exhibition
Photo credit: Xiaobin LV

Courtyards play a central role in mediating between architecture and nature. A narrow courtyard lines the north side, while a pine-filled courtyard occupies the south, remaining evergreen throughout the year. Ascending to the second floor, a bridge-like corridor connects two primary spaces and frames expansive views toward Red Mountain, reinforcing the building’s role as an interface between interior space and landscape.

Material experimentation continues on the upper level. The primary walls of the second-floor spaces incorporate semi-permeable acrylic panels embedded within the red concrete. One panel is punctured with small, dot-like openings that scatter light across the interior like a starry sky. The other uses brick-like openwork elements that echo the perforated masonry of nearby factory buildings. From the interior, large terraces open outward, allowing the mountain to dominate the view and transforming the building into a framing device through which landscape is experienced.

Behind its refined appearance lies a highly industrialized design and construction process. The precise red tone of the concrete was determined through extensive casting tests. Once finalized, digital controls were used during construction to maintain strict consistency in color and texture. Architecture, interior design, and landscape were developed simultaneously, with close collaboration between the design team and manufacturers of concrete, glazing, mechanical systems, lighting, and other building components.

Durability served as the project’s guiding principle. From the earliest design stages, architects and manufacturers worked together to meet high-precision standards, ensuring that form, space, light, and building systems would integrate seamlessly. The result is a building conceived less as a static object than as a finely engineered product—one designed to endure physically, culturally, and symbolically over time.

Mix Architecture

Founded in 2016, Mix Architecture is committed to exploring the possibility of architecture in various contexts to respond to the most primitive emotional and spiritual needs of human beings. By connecting imagination and reality, Mix Architecture creates space that enters deep consciousness through the exploration of the spirit of the site and the sensitivity to material construction, integrating people, architecture, and nature intrinsically.

As a qualified architectural design firm, its projects cover urban planning, architectural design, interior design, and landscape design. The team has long focused on the design and research of new business formats, cultural revitalization, urban renewal, and rural revitalization, offering creative and comprehensive solutions to increasingly complex and changing urban environmental, social, and cultural needs, and ensuring the integrity and quality of project completion through refined management and control processes.