Photos: Sneak peek of the new Northwestern Mutual Tower

A view of the atrium shows the glass above and actual preserved palm trees used inside. It joins the old and the new buildings together.

A hallway in the Commons area leads to the Tower.

Having just participated in the annual Roots & Wings 5K run and still in their running attire, Northwestern Mutual Life Insurance Co. financial representatives take a sneak peek inside the company's new building.

An escalator leads to another level from the Commons area.

A view of the atrium shows the preserved palm trees used inside.

While not living now, the palm trees inside the atrium are preserved in their living state.

Roots & Wings 5K run participants and Northwestern Mutual Life Insurance Co. financial representatives, including April Wallace (center) of Pruett Financial in Nashville, Tenn., use their phones to photograph the interior of the new atrium.

The Grand Hall is a space that can be divided into as many as three separate rooms with sky-fold doors. When set up with eight-person round tables, it accommodates 450 people. When set up for assembly seating, it can accommodate up to 700 people.

People stand in the hallway in the Commons area leading to the Tower.