The redevelopment of Indianapolis' Market Square area continues with the announcement that Deborah Berke Partners of New York City will work with locally based RATIO Architects on a 10-story office tower and “significant public green space” to replace a surface parking lot. In renderings released Wednesday, a slim, glassy tower hefts the bulk of its block-wide breadth southward, collecting sunlight as it reaches a low-rise mass around lush green space bordered by Market, Alabama, Washington, and New Jersey streets. Green roofs blanket both buildings, which will each have about 15,000 square feet of first-floor retail fronting onto a pedestrian plaza. The programs include a parking garage and conference center, as well as office space and retail. Columbus, Indiana–based Cummins makes and services natural gas engines and other fuel systems, employing about 48,000 people worldwide. About 250 workers, including top executives, will move into the building immediately, reported the Indianapolis Star, assuming the plan passes a City-County Council vote that could come as early as December 17. Mayor Greg Ballard has already voiced support for the project, which he said in a statement “raises the bar for architecture in Indy and will stand as a bold and visually compelling gateway into the city.” The building's form, a kinked rectangular prism, is slightly stepped and shifted to maximize natural light inside the office tower. Black, rib-like mullions vary the facade's texture when viewed from an angle. Local architect Wil Marquez told the Star it represents "a new type of architecture for Indianapolis." “This is the new vocabulary in architecture, tying together buildings and green space,” Marquez said. Along with a 28-story residential tower planned across the street, a rebuilt plaza space nearby and a sleek, new $20 million transit center by the City-County Building, Cummins' plans represent somewhat of a rebirth for this long neglected corner of downtown Indianapolis. Deborah Berke Partners beat out New York colleagues SHoP Architects and Tod Williams Billie Tsien Architects for the job.