This Ataturk (the guy on the right) relief is from the facade of Mersin’s regional health management building on a back street in the centre of town. I don’t know the exact meaning of the relief but the design is reasonably old, probably the same age as the building.
I don’t know the exact architectural style of the building but such a style is not very common in Mersin. In my opinion it looks post-Ottoman, if there is such a style. Here is a close-up of the entrance:
With a coat of paint and some attention, the building could look fantastic.