The curved dome atop 44 Union Square, the former headquarters of Tammany Hall, is structurally completed and the geometric glass panels that enclose the lattice frame are beginning to be installed. The renovation is designed by BKSK Architects and developed by Edifice Real Estate Partners. CNY Group is in charge of construction on the historic, 90-year-old landmarked structure, which is being expanded to 70,348 square feet. Two new floors will be housed beneath the dome and receive abundant natural daylight.