Tortudo Graeca - but what sort?

[Diddakai]

Hi - I'm a new tortoise owner, of an 18-month old male(?) spur thighed tortudo graeca.

He lives inside 24/7 in a hacked wooden Ikea toy box at the moment, which I'm pretty chuffed with. However, the ultimate plan is to move him to permanent outdoor accommodation - big earth and rock run, heated kennel.

I'm trying to figure out the best conditions for him and understand that tortudo graeca doesn't mean Greek Tortoise as I believed it did. Can anyone point me in the direction of a good online identification resource so I can try and narrow down his country of origin and therefore natural habitat? Or does it not matter - should I just treat him as mediterranean?

I'm pretty clueless, as you can tell...