Do monks get strongholds? Or for that matter do barbarians?
Every other class get strongholds (although some leave much to be desired)
but have they neglected the monk, surley not!

Please help me 'cause i don't know where , if one exists, to find it!

Yes the monk gets a stronghold too. When you finish Nalia's quest you get the choice of gaining control over the keep. Just like the fighter stronhold.