Architect Craig Dykers (of Norwegian-based design firm Snøhetta ) was joined by Mayor Bloomberg and other officials at 7 World Trade Center this morning to unveil new renderings for a downsized World Trade Center memorial museum and pavilion at the site of the former twin towers. The $80 million polygonal pavilion, which is being financed by New York State, will range in height from 57 to 72 feet and have about 40,000 square feet to use for public programs and museum exhibitions intended to "tell the story of the events of September 11, 2001 and February 26, 1993."

Located between the waterfalls and reflecting pools marking the towers’ location, and surrounded by a grove of oak trees that will mature to a height of approximately 50 feet, the pavilion will serve as the gateway into the underground galleries. One of the most striking aspects of the pavilion is its glass and steel atrium along the northwest corner, where two iconic "tridents" salvaged from base of the twin towers will be placed. According to Snøhetta, the tridents will "create an immediate visual reference to the distinctive ‘Gothic arch’ motif of the twin towers. And, in their re-erection at the site, they will convey strength, fortitude, resilience, survival and hope."

The ground floor will have ticket windows, and a large security screening area. The second floor is to house a 180-seat auditorium, a private room for relatives of 9/11 victims, and a small cafe. Floor three is strictly for ventilation and mechanical equipment related to the nearby World Trade Center Transportation Hub and the 1 train. The museum is to open in 2012, a year after the memorial plaza, and it's unclear if there will be an admission fee. The annual maintenance costs are expected to be in the $50 million range, but according to the Times, Joseph Daniels, president of the museum, promises, “If we can get the money from other sources, we won’t charge."