Kenneth A. Himmel of Related Urban, and Howard F. Elkus of Elkus Manfredi Architects are being recognized with The Massachusetts Building Congress’s highest honor, the Skyline Award for Outstanding Achievement. Given only six times in the organization’s 87-year history, the award recognizes exemplary contributions to the built environment and to the entire design, construction and development community. The award will be presented during a gala dinner celebrating their accomplishments on Oct. 9 at the Seaport Hotel in Boston. Howard F. Elkus is a principal and co-founder of Elkus Manfredi Architects, headquartered in Boston. Elkus is known for his design of Copley Place, the InterContinental Boston Hotel and Residences and Neiman Marcus at Natick Collection. Himmel is a renowned expert in developing projects such as the Time Warner Center, CityPlace in West Palm Beach, Reston Town Center, Copley Place and The Grand, underway in Los Angeles.