sentences:  650 California is visible from every direction except from the southeast, where the Financial District skyscrapers block the view.The building was designed by Edward Charles Bassett of Skidmore, Owings & Merrill for Hartford Insurance, its initial tenant.It is architecturally significant, featuring a tall modernist lobby, high ceilings, and an exterior skeleton of floor-to-ceiling windows recessed into a square gridwork of precast white reinforced concrete.