After five years of construction, architecture firm BOLLES+WILSON has completed the new home for the Bibliothèque National du Luxembourg, a visually striking and energy-efficient building that consolidates the Luxembourg national library’s immense collection of materials and functions. Initiated in 2003 after placing first in an international competition, BOLLES+WILSON’s library design was implemented in nine phases with a planning approach that prioritized energy efficiency and cradle-to-cradle principles wherever possible.