The bank was designed by Eero Saarinen in 1954, with landscape design by Dan Kiley. It is a low, glass-walled building set in a grove of trees. Unusual domed lights and an open interior creates a large open room and a feeling of openness and friendliness. The modern bank is linked to the 1910 office building and three-story building by a three-story glass arcade, which was designed by Kevin Roche and added in 1973. The garden arcade has redwood planters with trees and seasonal plants. The striped glass of the arcade is made to help moderate the extremes of temperature a glass building can experience.