 <unk> Alfred Du Pont ( also known as Dupont ) was hired to design images to decorate the exterior . Du Pont produced two 40 @-@ foot ( 12 m ) high silvery figures in <unk> , or raised plaster , on the western facade of the building , and a third on the north side . Du Pont applied colored concrete to the exterior and carved it into shape . Flanking the main street entrance are two male figures . The image on the right facing left is a Spanish explorer with a telescope raised to one eye . The image on the left facing right is a bare @-@ chested worker holding a globe , towering above the San Francisco – Oakland Bay Bridge , with sleek aircraft flying above and below him , and ships moving in the bay . The actual bridge can be seen from the house ; it had been completed the previous year when the Malloch Building was under construction . Around the corner from the main entrance , the third silvery mural shows a robed woman , the spirit of California , standing in front of California represented as a map . 
