Business complex FortyOne is the first LEED gold-certified office space in Belgrade. The complex is located on Milutin Milanković Boulevard and consists of three buildings under which an underground garage permeates. The objects of the complex are cubic forms with simple lines. Simple lines make it easier to see the form and arrange the functional units within the objects. The facade primarily contains surfaces under glass curtain walls, which are “bordered” with white facade elements. At the corners, over the glass curtain wall, blinds are placed, which, primarily, have the role of protection from the sun, but also additionally emphasize the structure, and give the complex dynamism.