Architectural Necessity or Promotion of Christianity?

Have you seen the new Richmond County Sheriff Office's headquarters building at 400 Walton Way, Augusta, GA?

Pattern of three crosses on side of building. Photo by Carol Taylor.

Cross-like pattern in red bricks in façade of building. Photo by Carol Taylor.

Are they architecturally necessary or desirable features or unconstitutional promotions of Christianity? Do you know anything about how these features came to be in a public building? Contact Americans United - CSRA Chapter to help answer this question.