The North 41 º proposes to apply a set of best practices in eco-innovation, sustainability, efficiency and quality in the provision of architectural services and construction that are evidenced, first, on the very process of construction of the building of its headquarters. The parallel N41 ° crosses the globe in key cities in the history of architecture to the present day as Oporto that aligns with cities like Chicago, New York, Barcelona, Rome, Istanbul and Tbilisi.