As promised last Sunday more designs from the wall of the church here in Bursa. The symbol closest to be represents the three persons of the Trinity, the other is a not so clear. There is an omega symbol on its side. This could be referirng to Christ who in the New Testament is called the "Alpha and Omega". I don't know what the S would stand for in this context. Both are sorrounded by what looks to me as a design based on the crown of thorns that was forced on Christ when he was crucified.