Sudler Associates of Denver. Ponti said, “Art is a treasure, and these thin but jealous walls defend it.” It is his only completed design built in the United States. Ponti designed the DAM building to break from the traditional museum archetypes. The two-towered "castle-like" façade has 24 sides, and more than one million reflective glass tiles, designed by Dow Corning, cover the building's exterior. The museum is included in the area of the Civic Center Historic District, which was listed on the National Register of Historic Places. The museum building was deemed "non-contributing". 2006–Present The Duncan Pavilion and the Frederic C. Hamilton Building were both added to the museum in 2006. The Duncan Pavilion, a 5,700-square-foot second story addition to the Bach Wing, was created to accommodate the bridge traffic from the new Hamilton Building and the existing North Building (1971). Duncan Pavilion was designed to be kid- and family-friendly while also suitable for multi-use, including the museum's Untitled Final Friday series as well as wedding receptions and other events. In December 2016, the Denver Art Museum announced a transformational $150 million project to unify the museum's campus and revitalize Ponti's building (now called the Martin Building), including the creation of new gallery spaces, two new dining options and the new Sie Welcome Center. With architecture and design led by Machado Silvetti and Denver-based Fentress Architects, the renovation project is slated for completion in 2021 in time for the 50th anniversary of Ponti's original building. The Duncan Pavilion was demolished in 2019. Hamilton Building The Frederic C. Hamilton Building houses the museum's Modern and Contemporary Art, African Art and Oceanic Art collections, along with part of the Western American art collection and special exhibition spaces. Designed as a joint venture by Studio Daniel Libeskind and Denver firm Davis Partnership Architects (architect of record), the glass and titanium- clad building opened on October 7, 2006. Recognized by the American Institute of Architects as a successful Building Information Modeling project, the Hamilton Building is Libeskind's first completed building in the United States. Recognized for its bold design, the iconic, four story, 146,000 square foot, the Hamilton building serves as the main entrance to the rest of the museum complex. This project doubled the size of the museum, allowing for an expansion of the art on view. The angular design of the Hamilton building juts in many directions, supported by a 2,740-ton structure