The office of the Supervising Architect of the Department of the Treasury, which was responsible for the design of federal buildings in this era, sought employ private architectural firms to ameliorate the effects of the Great Depression on that trade.

Many of the federal buildings of this period exhibit streamlined, almost austere, finishes and features; therefore, it is generally believed that Louis Simon, Supervising Architect of the Treasury, exerted a great deal of control over the design.

This elevation consists of a horizontal balustrade with simple Tuscan capitals and an unenriched entablature, flanked by two monumental pavilions.

The pavilions terminate the composition of the south elevation and consist of two 4' diameter, two-story high Doric columns in limestone.

The north elevation is the location of the loading dock and, at the northeast corner, the current entry door for the public to the postal sales area of the first floor.

The current postal lobby was sealed-off via aluminum doors and the finishes have been completely altered from the original appearance.

The rounded walls are clad with full height polished St. Genevieve Golden Vein marble.

The floors are buff terrazzo with brass divider strips and a Westfield Green marble border and base.

The decorative lintels feature egg and dart, dentil and scroll patterns with a modified keystone directly over the elevator doors.

The walls are punctuated by a series of marble engaged pilasters supporting a polychrome crown mold band with triglyphs.

[2] Other significant interior spaces are the courtroom, and the original Petit Jury room and rear hall of the third floor.

Behind the judge's rostrum are two sets of double marble engaged pilasters on each on which rests an elaborate, short entablature.