The area between the East and West wings is set 8 feet below street level. The northern part of this sunken area contained a pool of 140 by 120 feet that was drained and filled in 1957 due to leaks. Today it contains a grassy area used for outdoor gatherings. The rest of the area forms a terrace that is bordered by the wings of the building on three sides and partially covered by the connecting bridge. The entire terrace is paved in a mosaic pattern and surrounded by plant and flowerbeds. Weather permitting, the area is used for church and Bible school activities. The church tower was planned as a separate unit detached from the rest of the church, rising from the terrace level in an unbroken line of 166 feet. The base, measured at 17 by 23 feet, is located at the northeastern corner of the terrace pool. The tower is designed in a simple, geometric form with plain brick walls that open into a perforated design at the top. The perforated section surrounds the sounding chamber from which the organ chimes are broadcast. The simple design of the tower gives it dignity and strength, and its separate placement in relation to the church proper provides balance to the building. The church proper, located on the northeastern corner of the property, is set on a platform reached from the street by a set of nine steps. The entrance leads to the narthex, to the right of which is a coatroom and to the left of which are stairs that lead to the gallery. Three doors connect the narthex to the church nave, one to the central aisle, the second to the side aisle, and the last to a low passage that connects the church with the Bible school. The church proper was designed to create a serene, spatial atmosphere and thus has a unique asymmetrical design. Saarinen did not believe in forced symmetry because it created an artificial and sterile environment. Instead, he chose to focus on creating balance between various features and points of interest in the room. To this end, the cross at the end of the chancel is off center, but the communion table, integral to the service, is placed at the central axis of the church. Symmetry is used to accentuate the spirit of the service, instead of creating an artificial environment. Similarly, the middle aisle of the nave and the pulpit are slightly off center as well. Unlike many traditional churches, there are no stained glass windows. Instead, Saarinen designed windows with the same pattern used in the perforated part of the tower, adding to the unity and natural symmetry of the building.