I was curious about this T-Shirt so I did a little digging. Here's what I found out.
"Micronations are entities that claim to be independent nations or states but which are not recognized by world governments or major international organizations.
These nations often exist only on paper, on the Internet, or in the minds of their creators.
Christiania, is a self-proclaimed autonomous neighbourhood in Copenhagen.
The flag of Christiania is a red banner with three yellow discs representing the dots in the "i"s in "Christiania".
Jeans: Shey Fashion- January Group Gift
Boots: Avatar Brasil- Country Boots brown and black available
T-Shirt: **Guarded Cross**- Christiania
Information: Wikipedia- Freetown Christinia