Maps of the old Ottoman Empire:
http://www.naqshbandi.org/ottomans/maps/default.htm
Map of the old Roman Empire:
http://www.dalton.org/groups/Rome/RMap.html
So.
They were really in an expansionist phase for about 400 years.
Then they lost a lot of their empire/territory for a couple of hundred years.
Now...they're back...expanding again...with a vengeance too.