[quote=@bluetommy2]
How far is too far? I couldn't be like England right now considering you're Byzantium.
[/quote]

Maximum distance is a nation that can reach Byzantium easily by sea; meaning that almost all Italian States are open, especially if they have a Mediterrenean coast. Aragon is open too as it can reach the Balkans by sea even though it's in Eastern Iberia, but I'd advise against it.