Some people on here might remember him as the opera singer on Almora's "1945".

Apparently, he has also done a concert with his own band, featuring some metal songs (concert recording, not the best quality but pretty good):
http://www.youtube.com/watch?v=p_nNYDK1YHM
http://www.youtube.com/watch?v=Ra4OLkGDD44
http://www.youtube.com/watch?v=Zsaj6gemlhQ
this one also, gets heavy in the middle and end:
http://www.youtube.com/watch?v=1ZB3QB7PIxk

None of this stuff is on his albums, I checked his web site where you can play his albums in entirety. His albums are opera or Turkish music with operatic vocals, sometimes with electronic touches. Sometimes gets a little cheesy, and so do some of the songs he does in concert (for example I couldn't listen to "New York" and "My Way", although I liked Tom Jones's "Delilah"), but mainly it's high quality stuff.

I'm not sure if any of it is originally written songs either, none of the ones in English or Italian are, have no idea about the ones in Turkish. Still a great singer.